Kiss×sis (キス×シス Kisu×shisu?) is a Japanese seinen manga written and illustrated by Bow Ditama. The manga originally was printed as a one-shot in January 2004 in Kodansha's seinen manga magazine Bessatsu Young Magazine, and began regular serialization in the same magazine on December 11, 2005. As of September 2010, six tankōbon volumes of the manga have been released in Japan. An original video animation episode by Feel was bundled with the third manga volume released on December 22, 2008. A TV anime series adaptation produced an "alternate retelling" from the OVAs was announced on November 13, 2009, which closely follows the manga though with minor changes.


Kiss×sis's story begins with Keita Suminoe, a male third-year junior-high school student studying for his high school entrance exams. He is living in a home with his older twin stepsisters, Ako and Riko, who kiss, flash, and display their love for him in public. They help him prepare for his exams. Keita begins to become romantically attracted to his two stepsisters and he initially dislikes himself for it, though they share no blood-relation to him. Seeing this attraction, his two parents encourage him to eventually get married to one of them, with Ako and Riko constantly at odds for Keita's attention, or working together to keep his attention away from other girls.


Suminoe family

Keita Suminoe (住之江 圭太 Suminoe Keita?)
Voiced by: Ken Takeuchi
Keita is a third-year junior-high school student studying for his high school entrance exams and although he is the younger brother, it is obvious he is the most mature of the three siblings. He wants to enter the same high school as his older twin step-sisters Ako and Riko, studying hard while getting help from his sisters as well as planning on his track scholarship for another school. While at first he initially dislikes himself for becoming attracted to Ako and Riko, he later becomes proactive in his desires. It is later revealed he was in love with his sisters when they were kids, and even used all of his money that he saved up for a prayer that he could marry both of them. This changed when he found out from his father that polygamy is illegal and "grew up". He has a low tolerance for alcohol, and will become livelier when he drinks, but after he sobers up he does not remember anything he did. After chapter eighteen of the manga, he makes it into his sisters' school, Gakushū Senior High. He has strong morals (that have clearly weakened with the constant "attacks" his sisters have done throughout the series), as he will try to resist them the best he can; but if pushed too far he will simply indulge in the moment. He often gets an erection when his sisters give him their "good morning kiss". He has also shown an attraction towards Miharu and Yuzuki.
Ako Suminoe (住之江 あこ Suminoe Ako?)
Voiced by: Ayana Taketatsu
Ako is the elder twin sister. A way to tell her apart from Riko is that she wears a hair clip to keep the hair off her forehead. She has a reliable, level-headed personality, but can be sullen, moody, even a bit childish and is quickly embarrassed. She carries herself differently than her sister, is more skilled in cooking which she learned to help her mom out with the housework. She has a high alcohol tolerance, which she sometimes uses to her advantage to knock out Riko to have the livelier Keita all to herself. Although when this happens something usually interrupts them, and Ako is left extremely wet and unsatisfied. She is a closet pervert and more often planning her seduction of Keita, even hiding porn magazines in her room. At school, she is on the school committee, but has a habit of abusing her authority to get Keita.
Riko Suminoe (住之江 りこ Suminoe Riko?)
Voiced by: Yuiko Tatsumi
Riko is the younger twin sister. A way to tell her apart from Ako is that she wears her hair in a ponytail, and it is longer than her sister's hair. Also, she has a bandage below her left eye. She has a habit of answering truthfully but very bluntly, causing everyone else to jump to conclusions, even at one time about to honestly state that she and her sister wanted a computer solely for porn, however was quickly stopped by Ako. She is much shyer in person than her sister, as she could not kiss Keita in front of others. However when shes in her own home, she has no qualms about showing Keita her underwear. Sometimes she even uses his arm or legs as stimulation for her vagina, by rubbing herself on him. At school, she is on the disciplinary committee, where she uses a bokken/shinai to punish the students and she has more of a strict personality, yet just like her sister will abuse her authority to get Keita. She is also a terrible cook.


Miharu Mikuni (三国 美春 Mikuni Miharu?)
Voiced by: Yoriko Nagata
A high school student at Gakushū Senior High, Miharu is depicted as a busty meganekko whom has feelings for Keita and is one of several girls vying for his love. Due to her fondness for him coupled with often getting caught in the crossfire between Ako, Riko and Mikazuki and their antics, her classmates believe her to be involved with Keita though at times she denies having anything to do with him due to her shyness and inexperience with boys. Her involvement with Keita stems from several embarrassing incidents where he discovers that she suffers from enuresis and will at times accidentally wet herself in school or when in a tense situation. Believing that she will be ridiculed by her peers because her secret was found out, she became fond of Keita when he promised not to tell anyone. As such, her attraction for him grew resulting in her being flustered whenever around him, having perverted fantasies about a possible relationship and even experiencing an orgasm while being given a piggy back ride by Keita to the school infirmary, however Ako, Riko, and Yuzuki all realize that she has a higher chance of winning Keita's heart then they do. Also after an event during a trip to the beach, she starts to realize she is indeed in love with Keita. In the anime, she has a habit of looking as if she needs to go to the bathroom every time she sees or even hears Keita.
Mikazuki Kiryū (桐生 三日月 Kiryū Mikazuki?)
Voiced by: Asuka Okame
An underclassman who was once in the same sports club as Keita in junior high, Mikazuki is portrayed as a seductress going to great lengths to get his attention including flashing and performing suggestive acts. Due to her pursuit for his affection, she is in a rivalry with Ako and Riko—often referring to them as one person called "Ako-Riko"—in addition to Miharu, whom she mistakenly believed lost her virginity to Keita after witnessing them hugging, and her older sister Yūzuki. She often teases her older sister, a teacher at Gakushū Senior High, about her secret otaku ways addressing her as "my otaku sister" when in private and forcing her to cosplay and assume lewd poses while she takes pictures. Despite this, she cares for her sister and will go out of her way to protect Yūzuki from being discovered as an otaku, or the fact she too has feelings for Keita.
Yūzuki Kiryū (桐生 夕月 Kiryū Yūzuki?)
Voiced by: Asami Imai
The older sister of Mikazuki, Yūzuki is a teacher at Gakushū Senior High and the homeroom teacher of Keita and Miharu. She lives by herself in an apartment complex, having been forced out of her parent's home due to her uncontrollable expenditures on her hobbies. She is secretly an otaku, fujoshi and avid cosplayer with a particular taste for anything samurai related. Due to her closet hobbies she typically eats instant noodles to cope with the financial stress. Her lack of experience with men also causes her to feel insecure about her virginity.
Through a series of unfortunate mishaps as well as her ignorance of the situation, Yūzuki's impression of Keita is that of a deviant playboy who is having an incestuous relationship with his sisters. Despite her attempts to stop Keita from partaking in immoral behaviors with his sisters, she often has perverted thoughts about their relationship. However, over time she starts to develop an attraction towards him which leads to her fantasizing and engaging in licentious behaviors either with him or with some of his belongings, where she masturbates to the thought of them together or the thought of him being raped by Samurai Generals. Yūzuki is seen as a threat for the affection of Keita by both Ako and Riko due to the assumption that their brother has a fetish for busty older women. Despite these feelings she has for him, she knows at the same time it is wrong for her to do so, and will often try to calm herself down by repeating "I'm a teacher" in her head.



Kiss×sis began as a seinen manga series written and illustrated by Bow Ditama which originally began as a one-shot printed in January 2004 in Kodansha's seinen manga magazine Bessatsu Young Magazine.[1] The manga began regular serialization in the same magazine on December 11, 2005. The manga was transferred to Monthly Young Magazine on December 9, 2009 as Bessatsu Young Magazine becomes a monthly publication instead of a bimonthly one.[2] The first bound volume was released in Japan on September 6, 2007 published under Kodansha's KC Deluxe imprint.[3] As of September 2010, six tankōbon volumes have been published.[4]


It was announced in June 2008 that an animated adaptation of the manga series would be produced.[5] An original video animation episode produced by the studio Feel and directed by Munenori Nawa was bundled with the third manga volume released on December 22, 2008 as "episode 0".[6][7] Another OVA episode, "episode 1", was bundled with the fourth manga volume released on May 22, 2009.[8][9] The third episode, "episode 2", was bundled together with the fifth volume of the manga on November 20, 2009.[1][10] A fourth episode was released with the sixth volume of the manga on June 4, 2010. At the end of the third episode it was announced that pre-order sales will end a couple months before it goes on sale, and there will on be an exact number of copies produced to match the pre-order sales.[11] A fifth volume was released on November 22, 2010 with the sixth volume of the manga. The series uses two pieces of theme music. The opening theme is "Honey Boy for Two" (ふたりの♥ハニーボーイ Futari no ♥ Hanibōi?) by Ayana Taketatsu and Yuiko Tatsumi, and the ending theme is "Starry Sky Tale" (星空物語 Hoshizora Monogatari?) by Nana Takahashi.

Episode listing
# Title Original air date
"episode 0" ()
December 22, 2008[7] {{{FirstEngAirDate}}}
Keita Suminoe has trouble resisting the sexual advances of his twin stepsisters, Ako and Riko.
"episode 1" ()
May 22, 2009[9] {{{FirstEngAirDate}}}
Keita injures his hand at school and Ako and Riko compete to help him out.
"episode 2" ()
November 20, 2009[10] {{{FirstEngAirDate}}}
At Christmas, Keita, Ako and Riko go to a karaoke bar where they all end up getting very drunk.
"episode 3" ()
June 4, 2010 {{{FirstEngAirDate}}}
While searching through Keita's room, Ako and Riko find a dirty magazine featuring siblings in a threesome. Wondering if they may end up doing the same thing with Keita, they have a 'practice threesome' with a dummy. At the end of the episode, Keita reveals that one of his friends sneaked that into his backpack without his knowledge, much to the sisters' embarrassment.
"episode 4" ()
November 22, 2010[12] {{{FirstEngAirDate}}}
Keita, Ako and Riko go to a hot spring resort, end up in an erotic museum, and find themselves in some compromising situations surrounding one of Ako's alcoholic purchases from the museum.
06 Their First Time
"" (初めて)
May 10, 2011 {{{FirstEngAirDate}}}
Episode 5 (6th Kiss x Sis OAD)

TV anime

A 12-episode TV anime adaptation of the manga aired on AT-X between April 5 and June 21, 2010. A censored pre-release of the first episode aired online on March 28, 2010. The opening theme is "Balance Kiss" (バランスKISS?) performed by Ayana Taketatsu and Yuiko Tatsumi, and the ending theme is "Our Steady Boy" by Yui Ogura and Kaori Ishihara. The ending theme for episode 12 is "Futari" (ふたり?) by Ogura and Ishihara. The first DVD volume was released on June 23, 2010. Unlike the TV airings of the other episodes, certain scenes of episodes nine through twelve were censored.

Episode listing
# Title Original air date
01 Wonderful Days
"Wandafuru Deizu" (ワンダフルデイズ)
March 28, 2010 (pre-release)
April 5, 2010 (TV)
Keita Suminoe has a problem with his twin step-sisters, Ako and Riko, being overly romantic towards him. However, he wants to attend the same high school as them, so is uncertain on what to do when he has to attend a parent teacher session involving him turning down a recommendation. When Ako and Riko find his notice letter while looking in his room, they go over to his school, only to be chased by several of their old admirers. Keita stops everyone and tells his sisters off for bothering him, but when he realizes why they came, he catches up with them and apologizes, revealing he turned down the recommendation so he could study to get into their high school.
02 A Lesson for Two
"Futarikiri no Ressun" (二人きりのレッスン)
April 12, 2010 {{{FirstEngAirDate}}}
Ako decides to help Keita study in order to improve his passing rate, though both have a little trouble staying focused on the matter at hand. Ako shows Keita her chest in order to encourage him to study, but this ends up being all Keita can think about in class. Ako decides to try an alternative method, writing the notes on her body. Despite embarrassing himself in school while distracted, he fares better on the tests. However, when Keita likens a kiss from Ako as a penalty game, Ako gets mad and corners him, eventually making him do a wrong answer so he would have to take the penalty game. They hint at going further, but are stopped by Riko, who had been learning how to prepare food for Keita, though it ends up tasting bad. Despite this, Keita manages to improve his grade.
03 Alluring Sweets
"Miwaku no Suītsu!" (魅惑のスイーツ!)
April 19, 2010 {{{FirstEngAirDate}}}
Keita gets annoyed with being kissed by Ako and Riko him all the time and instigates a ban on kissing. Overhearing that Keita likes sweet things, Riko tries to make him some chocolate, but can only manage something horrific. After finding one of her father's dirty DVDs, she gives Keita some chocolate lipstick, persuading him to eat it off her lips. Before they manage to go any further, they are interrupted by Ako who destroys the lipstick. Riko gives Keita another chocolate lipstick, however it was made from the horrible tasting chocolate that she had made.
04 Qualifications of a Lover
"Koibito no Shikaku" (恋人の資格)
April 26, 2010 {{{FirstEngAirDate}}}
While Keita studies at school, Ako and Riko reminisce on when they started going to junior high, the first time they were apart from Keita. When they watched Keita perform athletics, they fell in love with him. Meanwhile, their teacher, Yūzuki Kiryū, eavesdrops on their discussions and begins to worry about what is going on with them. After studying, Keita runs into Ako and Riko at the shrine, where they were praying for his success. He remembers when he was young and prayed to marry both Ako and Riko, only to be told by his father that polygamy is illegal. Keita makes his wish and the three return together.
05 I'm Sorry!
"Gomen Nasai!" (ゴメンナサイ!)
May 3, 2010 {{{FirstEngAirDate}}}
While talking to his friends, Keita accidentally gropes his fellow student, Miharu Mikuni, and gets slapped. Ako and Riko become suspicious about whether Keita has been 'cheating'. When Keita goes to study at the library, Miharu, who is the librarian, becomes too intimidated by Keita to go to the bathroom, believing he would attack her if she took her eyes off him. Before she can go to one, Keita tries to return a book she dropped (which looks like Miharu's student identification booklet) and chases after her, dragging her into various hiding spots to hide from Ako and Riko. However, they end up getting locked in the gym storage room and their hashed escape plan leads Miharu to relieve herself on Keita's back. They eventually manage to escape and Keita promises to keep Miharu's incident a secret, though gets beaten up when he accidentally sees where Miharu had removed her panties from.
06 Uneasiness at Akihabara
"Munasawagi no Akiba" (胸騒ぎのアキバ)
May 10, 2010 {{{FirstEngAirDate}}}
Unable to view and get porn from the internet using a PC their father won at a raffle, Ako and Riko decides to buy erotic games in Akihabara. But in the process Keita has to accompany them, so they devise a way to hide their real purpose for going to Akihabara. Ako distracts Keita by taking him to a cosplay shop while Riko investigates the adult section of a game shop. While changing, they run into Ako's teacher, Yūzuki Kiryū, who is a closet otaku (dressed as Mahoro from Mahoromatic Maiden). Riko later encounters her while trying to get a special edition game. After meeting Keita and being reminded about Ako and Riko's crush on him, Yūzuki drags him off to talk to him, inadvertently taking him to a cosplay-themed love hotel. After later being found by Ako and Riko, the group are encountered by Keita's kōhai and Yūzuki's younger sister Mikazuki, who covers for Yūzuki by stating she was buying the game for her. In return for bailing her out, she gets Yūzuki to cosplay as Mai Shiranui for her that night.
07 Wh-What!? A Dripping Wet Midsummer Delusion
"Na, Nan to~?! Bisho Nure Manatsu no Mōsōkyoku" (な、なんと~っ!?びしょ濡れ真夏の妄想曲)
May 17, 2010 {{{FirstEngAirDate}}}
One of Keita's friends, Toda, coaxes him into going to the pool with him and Mikazuki and inviting Ako and Riko. Suspicious of what they might be up to, Yūzuki decides to tail them, despite having a financial dilemma (since admission to the pool is costly). While trying to hide from them in the bathroom, she is found by Ako and Riko who, mistaking her for a peeping tom, splash her with water. With her clothes soaked, Yūzuki borrows Keita's gym outfit. Later that night, Yūzuki becomes entranced by the smell of Keita's outfit and masturbates while wearing it and having sexual fantasies about Keita. She wakes up the next day to find that she had soaked his pants in the process. Oddly, Keita is having a nightmare about his teacher doing "stuff" with him.
08 It's Always That in August
"Hachigatsu wa Itsumo Are" (八月はいつもアレ)
May 24, 2010 {{{FirstEngAirDate}}}
The summer festival comes, and it is the only day Keita is free from all the prep school work. This means that Ako and Riko will have to compete for a night at the festival with him, although they all go to the festival together. But a few incidents involving paraders enables Ako and Riko to indeed spend some time with Keita alone. They also had to contend with Yūzuki, who was patrolling the fair and catches Riko and Keita in the forest; Mikazuki, who is Miss Mikoshi; and a naughty chick that Ako bought that caused Keita to see Miharu peeing in the bushes. When Keita comes back to where his sisters are located, he is beaten up.
09 Turning to God Only in Times of Suffering
"Kurushii Toki wa Kamidanomi" (苦しい時は神頼み)
May 31, 2010 {{{FirstEngAirDate}}}
As Keita tries to study, Ako and Riko compete with each other to be the most helpful. While alone in the room, Riko and Keita end up doing some 'footplay' under the kotatsu until Ako catches on. While looking up on good luck charms to help Keita with his studies, Ako and Riko learn of one that is made using pubic hairs. After much deliberation, the sisters pluck their own hairs to make the charm and give it to Keita, convincing him not to look inside. Keita takes it to school with him, though, and Ako and Riko are understandably embarrassed.
10 At Last, the Real Thing!
"Tōtō Honban" (とうとう本番!)
June 7, 2010 {{{FirstEngAirDate}}}
Keita becomes ill before the big exams, and Ako and Riko step up to the mark by getting out of school and making Keita feel better by nursing him back to health. However, a slow recovery is the last thing Keita wants as his two stepsisters fight for the place closest to his heart. Both of them end up licking the sweat off his body, which passes the cold over to them while Keita makes a full recovery. Yūzuki, who proctors the exam, is surprised to find Keita there. While Keita takes his exams, Ako and Riko remember how Keita was there for them when they were taking their exams. After returning from his exams, Keita gives his thanks to a "sleeping" Ako and Riko, who are surprised about it once he leaves.
11 Nitpicking a Good Day!
"Ii Hi, Damedashi!" (いい日、ダメ出し!)
June 14, 2010 {{{FirstEngAirDate}}}
Keita eagerly awaits the results of his exams, with Ako and Riko trying to give him good luck, though encounter several unlucky omens along the way. When they get to the notice boards, Keita's number wasn't listed and the trio become depressed. After noticing the celebratory preparations Ako and Riko prepared, Keita cheers up and decides it's best not to waste it. Later that evening, Keita is visited by Miharu, whose dog had previously nabbed Keita's posted results from his mailbox. After reading them, Keita learns that he had in fact passed the exams, hugging Miharu in his excitement. After Miharu gets scared off by Ako and Riko, Keita tells them the good news.
12 One, Two, Three P!
"Ichi, Ni no, San Pī!" (いち、にの、3P!)
June 21, 2010 {{{FirstEngAirDate}}}
After Keita's graduation, Ako and Riko arrive to find they were too late to get the second, or any button, off of Keita's blazer. They decide, against Keita's will, to hold a draw for consolation prizes from Keita, with Ako, Riko, Mikazuki and Miharu as participants. Ako's hope backfires and ends up getting Keita's shirt collar, Mikazuki wins the opportunity for Keita to flip her skirt, though he is unaware she wasn't wearing any underwear. Riko wins a chance to kiss Keita in front of everyone, but is too embarrassed to do it. Miharu gets the remaining prize, to spend five minutes in the equipment room alone with Keita to do anything. Keita simply uses the time to thank Miharu, but after a slip up, they end up in a compromising position, leading Ako and Riko to assume the worst. Later that night while Keita goes to sleep, Ako and Riko make a move on him, though this just gives Keita weird dreams. As he subconsciously grabs his jacket, a button he had been saving for them falls out, and they decide to stop. As the new semester starts, Keita walks hand in hand with Ako and Riko to high school together.


  1. 1.0 1.1 "Kiss×sis Manga Gets TV Anime Green-Lit for Next Spring". 2009-11-13. Retrieved 20 November 2009. 
  2. "Bessatsu Young Magazine Goes Monthly on December 9". Anime News Network. 2009-10-16. Retrieved 20 November 2009. 
  3. Script error
  4. Script error
  5. "Kiss×sis Manga from Mahoromatic's Ditama to be Animated". Anime News Network. 2008-06-20. Retrieved 2008-06-20. 
  6. "20th Century Boys 2 Film, Stitch!, Kissxsis Dated". Anime News Network. 2008-08-06. Retrieved 2008-08-06. 
  7. 7.0 7.1 Script error
  8. "Kiss×sis Manga Gets Another Anime DVD Green-Lit". Anime News Network. 2008-12-18. Retrieved 2008-12-18. 
  9. 9.0 9.1 Script error
  10. 10.0 10.1 Script error
  11. "Kiss×sis Manga Gets 4th Original Anime DVD Green-Lit". Anime News Network. 2009-11-20. Retrieved 29 November 2009. 
  12. "Kiss×sis Manga's 5th Original Anime DVD Listed". Anime News Network. June 2, 2010. Retrieved June 4, 2010. 

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