Yosuga no Sora (ヨスガノソラ?, lit. "Sky of Connection") is a Japanese romance/drama adult visual novel developed by Sphere. The game was originally released for Windows PC on December 5, 2008.[1] It has since been adapted into a serialized manga and a TV anime series. A sequel/fan disk titled Haruka na Sora was released later on October 24, 2009 which contains new and expanded scenarios for several characters from the original game.[2]


Tragically orphaned by an automobile accident, the Kasugano twins travel to their grandparent’s countryside residence via railcar, hoping to reconstruct the shards of a shattered life. Future uncertain, Haruka Kasugano clings to memories of the past, hoping to find the strength he needs to safeguard his ailing sister. With a destiny irrevocably tied to that of another, Sora Kasugano clings to moments of the present, drawing comfort and security from the company of her brother. Two lonely souls so physically alike, yet spiritually divergent, unaware of the challenges these conflicting expectations will unveil in the days to come.[3]


Main characters

Haruka Kasugano (春日野 悠 Kasugano Haruka?)
Voiced by: none (game), Hiro Shimono (anime)
The protagonist of Yosuga no Sora. With a gentle appearance and slim profile, in many ways Haruka is the spitting image of his fraternal twin sister Sora. Personable and honest, he forges lasting friendships with remarkable ease. Haruka copes with the loss of his parents with a stout heart, burdened with the knowledge that the future of his delicate sister depends on him. As a result, he has a tendency to dote on his sister and worry about her constantly. He cannot swim either. Sora and he are well regarded around the village, as their grandfather was once a doctor there.
Sora Kasugano (春日野 穹 Kasugano Sora?)
Voiced by: Hiroko Taguchi (game, anime)
A quiet, fragile and reclusive girl, and fraternal twin sister to the main protagonist. Cursed with illness and frailty since birth, Sora was denied the sort of independent life that many take for granted. Yet beneath Sora's angelic doll-like appearance lies a troublesome personality that’s prone to withdrawn laziness and demonstrates a rather severe lack of social graces. In all honesty, Sora doesn't care for anyone else, and would much rather just surf the Internet and eat instant food, so long as Haruka is always by her side. It's implied that her strong bond with Haruka, strengthened as a result of the tragic loss of their parents, may be leading her towards fantasies of incest between twins. She is the main heroine of the series. She hates Nao, although it is implied that they were once good friends. She is often seen carrying a rabbit doll, which she received as a present before she and Haruka left the village.
Nao Yorihime (依媛 奈緒 Yorihime Nao?)
Voiced by: Yuka Inokuchi (game, anime)
Beautiful, intelligent and an excellent swimmer, Nao is Haruka's next-door neighbour and childhood friend. When the Kasugano twins last visited the area, their departure was particularly painful for Nao, who had grown quite close to Haruka, to the point of having sex with him on one occasion, about which she feels guilty. Upon their return, she attempts to rekindle their former close relationship. Nao’s compassion and maturity projects an sense of sisterly love towards others, though for Haruka there is a deeper and more intimately sensual feeling. Sora harbors great resentment towards the popular Nao, though she resists every request to explain the reasons why, although it is likely because Sora saw the pair having sex when they were younger.
Akira Amatsume (天女目 瑛 Amatsume Akira?)
Voiced by: Kayo Sakata (game, anime)
The ever-cheerful Akira lives alone at a small yet sacred Shinto shrine. Since the passing of her foster father two years ago, she has been in the care of Yahiro, who lives nearby. Akira’s energetic liveliness is contagious to those around her, with an innocent personality that makes befriending the girl second nature. Due to her residence, Akira spends much of her time practicing the habits and traditions of a miko shrine maiden, including performance of requisite ceremonies and holiday festivals. She also devotes a lot of her time to helping the elderly in the village, making her beloved by all. She is later revealed to be Kazuha's half-sister.
Kazuha Migiwa (渚 一葉 Migiwa Kazuha?)
Voiced by: Ryōko Ono (game, anime)
The stunning daughter of an influential magnate, Kazuha lives a cultured life that some might compare to modern princesses. Sharp-minded and attentive to detail as a result of her parents' constant travels and long distance liaisons, she learned from a young age to behave responsibly and befitting her social standing. Nevertheless, Kazuha does not consider herself superior to others, and doesn't hesitate to lend a helping hand whenever asked. Kazuha is an experienced viola player, yet she shies away from playing in competitions, preferring to play only for those she cares for. She dotes on Akira constantly and worries excessively for her well-being, and this leads some to speculate that they may be romantically involved. However, it is later revealed that Akira is Kazuha's older, illegitimate sister from a different mother.
Motoka Nogisaka (乃木坂 初佳 Nogisaka Motoka?)
Voiced by: Tae Okajima (game, anime)
Motoka is a college student struggling to make ends meet, working as a maid in the Migiwa Household to pay the expenses of tuition. While not ideally suited for household chores, her warm compassion and captivating personality offset these deficiencies. She is best friends with Ifukube Yahiro, a notorious drinker, which makes Motoka’s low tolerance to alcohol a particularly hazardous social issue, especially since she has a particular fondness for the taste of sake.

Supporting characters

Kozue Kuranaga (倉永 梢 Kuranaga Kozue?)
Voiced by: Yukari Minegishi (game, anime)
Chairman of the Student Body, a position of serious responsibility and important functions, Kozue is often seen as a stick in the mud by her peers. She nevertheless cares for them, only nagging to mitigate the potential community damage. This often proves to be a full time job however.
Yahiro Ifukube (伊福部 やひろ Ifukube Yahiro?)
Voiced by: Ryōko Tanaka (game, anime)
Best friend to Nogisaka Motoka and proprietor of a family owned candy store, the rouge looking Yahiro would prefer spending her time sleeping and drinking. In truth, the ill tempered and sardonic mannerisms hide Yahiro’s true personality: a woman whose past is a field littered with the shattered glass of lost dreams, forgotten promises, and broken romances.
Ryouhei Nakazato (中里 亮平 Nakazato Ryōhei?)
Voiced by: Takurou Nakakuni (game, anime)
For all his faults and freakish behavior, Ryouhei is the kind of person you can always count on, in spite of being a self-confessed idiot. Carefree and spontaneous, he brands himself as the ultimate ladies man, applying cheesy pickup lines whenever a pretty face draws near. Yet when the situation calls for it, Ryouhei can offer profoundly sound advice, with an eye that quickly identifies the root of a problem.



Release history

The game was originally released for Windows PC on December 5, 2008.[4] A sequel/fan disk titled Haruka na Sora was released later on October 24, 2009 which contains full scenarios for Kozue and Yahiro, an expansion to Sora's story from the original game, and additional bonus material.[5]



Yosuga no Sora has been adapted into a 12-episode anime series that started airing on October 4, 2010. Each episode consists of a 22-minute feature segment and a 3-minute omake segment. The main plot of the anime is presented in a multi-arc branching format that will independently tell the stories of Kazuha, Akira, Nao, and Sora while sharing certain common episodes. The title of each episode incorporates the names of the characters it concerns. The bonus segment focuses on Motoka's story, relying more extensively on humor and super-deformed character designs. Each segment has its own ending credit sequence in each episode.

Episode list (Main Feature)

(In brackets are the episode numbers for each arc, e.g. (A3) is the thrid episode in Akira's arc)

# Title Original air date
01 (AKNS1) Distant Memories
"Haruka na Kioku" (ハルカナキオク)
October 4, 2010 {{{FirstEngAirDate}}}
After the sudden death of their parents, Haruka and his twin sister Sora move to the house formerly inhabited by their late grandfather, in a small village they often visited as children. There, Haruka encounters several of the residents, some of whom are old friends, but Sora stays at home, refusing to go to school even as Haruka starts attending. Realizing that Haruka is growing more and more distant and slipping from her grasp, Sora goes to Haruka's room at night and appeals to Haruka as she removes her clothes...
02 (AK2) Akira Embarrassed
"Akira Hazukashi" (アキラハズカシ)
October 11, 2010 {{{FirstEngAirDate}}}
Sora asks Haru to take her measurements so she can have a uniform made, and finally starts attending school with Haruka, though she is disappointed to find that she and Haruka are in different classes. While cleaning the swimming pool as part of a mixed gym, Akira accidentally soaks Kazuha who forgot her swimsuit, and so Akira takes her to dry off. Haruka finds Kazuha's phone and goes to return it, but overhears a sensual-sounding conversation in which Kazuha addresses Akira as "Onee-chan" (big sister).
03 (K3) Indecision
"Tsukazu Hanarezu" (ツカズハナレズ)
October 18, 2010 {{{FirstEngAirDate}}}
Upon realizing that Haruka overheard their conversation, Kazuha chases him down to clear up any misunderstanding. She reveals that Akira is, in fact, her illegitimate older sister, born of a different mother. Due to her family's societal standing, Kazuha's father is not able to acknowledge Akira as his daughter, causing Kazuha to be resentful of her father and to feel a burden of guilt and responsibility towards the always-hard-working Akira. To help lift Kazuha's spirits, Haruka invites her out on a date, and they subsequently realize and admit their rapidly-progressing feelings towards each other. Meanwhile, Akira continues to try her best on her own, but collapses, apparently due to exhaustion.
04 (K4) Haruka's Heart
"Harukazu Hāto" (ハルカズハート)
October 25, 2010 {{{FirstEngAirDate}}}
On their way home from school, Haruka and Kazuha are interrupted by a frantic Yahiro, who expresses great concern that the always-responsible Akira hasn't shown up as scheduled. They discover Akira at her home, collapsed due to exhaustion, and Kazuha proceeds to blame herself and her infatuation with Haruka for not noticing Akira's condition. Akira recovers a few days later, but confronts Kazuha about her abandonment of Haruka and the inappropriate sense of guilt she feels regarding their father's actions. Realizing the truth of Akira's words, Kazuha withdraws into a depression while she struggles to determine what to do. The day of the festival arrives, and Kazuha works up the courage to appear, where she is reunited with Haruka. Haruka informs Kazuha that her father had been supporting Akira financially in secret all this time and, when Kazuha witnesses her father praising Akira, she realizes that she had misjudging him. Thus, she was able to move past her codependency towards Akira and pursue a whole-hearted romantic relationship with Haruka.
05 (A3) Darkness Brightens
"Yami Akiraka ni" (ヤミアキラカニ)
November 1, 2010 {{{FirstEngAirDate}}}
Haruka is standing near the girls locker room, listening in on Akira's and Kazuha's conversation. Haruka notices that Akira has been acting strange lately, and decides to talk to her alone at school the next morning. He sees the sad look on Akira's face and becomes worried, and wants to help Akira find her mother's pendant (after remembering her losing it as a child). They go in search for the pendant by a tree they would play by as kids, only to Haruka's horror that the tree had been removed by a landslide. He attempts at digging around for it, but without any luck. The two go to Akira's to take a bath, and have a romantic moment together. From there, Haruka goes to the festival, and, after seeing Akira cry while dancing the sacred dance, rushes off to see what had happened.
06 (A4) I Won't Give Up
"Akiramenai yo" (アキラメナイヨ)
November 8, 2010 {{{FirstEngAirDate}}}
Haruka enters Akira's room and stops her from burning something, which is his mother's missing journal, where it is written that Kazuha and Akira has a chance of mistaken identity. With the journal, he suggests to Yahiro and Kazuha a DNA test to prove things once and for all. Yahiro refuses, but, despite disapproval from her mother, Kazuha agrees. Haruka informs Akira at the shrine the next day that the DNA results will be out in five days, but Akira disappears on the fifth day. Haruka finds her at the train station, where they talk until the evening. When the DNA results arrive that night, Kazuha and Sora delivers it to Akira, who is still at the station, but she buckled, too scared to read it. It is then that Kazuha's mother appears, and tells everything at their home, where Akira is shown the lost pendant, returned to her by someone who found it at the mountains, basing on the name engraved on its back. She reveals that she and Akira's mother had shared the same hospital room, and, one day Akira pulled the pendant off of her neck as Mrs. Migiwa held her in her arms. After hearing that Akira's mother had passed away, she gave the pendant to her to make her feel, at least, the presence of a mother. Akira then reads the DNA results, and it read negative, which means Akira is born of a different mother. There, Kazuha's mother let her keep the pendant, and apologizes to Akira. She later confesses her love for Haruka and vice-versa.
07 (NS2) Sinful Maidens
"Tsumi na Otomera" (ツミナオトメラ)
November 15, 2010 {{{FirstEngAirDate}}}
Sora asks Haru to take her measurements so she can have a uniform made. The next day Nao comes over to bring Haruka some mosquito repellent, since Sora is scared of mosquitoes, and then leaves almost immediately. The next day Ryouhei invites Haruka to the school rooftop to take a peek at the girls cleaning the pool. Haruka warns Ryouhei, though, not to peek at Nao, and leaves. Much later Ryouhei tells Nao that Haruka, “the prince she has been waiting for,” has a crush on her; but she thinks he does not like her. The truth is that something happened between the two many summers ago: Nao, trying to escape the noise of her arguing parents, ran to Haruka's house. At that time Haruka was sleeping at their veranda, and was surprised to see Nao on top of him with her clothes undone. Until now Nao feels guilty for what she did. However, Ryouhei, even Akira and Kazuha, is into the act of bringing Haruka and Nao together. They did so by making the two meet at school pool on a Sunday. When they were changing after the swimming lesson, Haruka rushes into the girls' locker room when Nao was scared by a black cat inside a box. The school supervisor hears their chatter, but the two were able to hide inside a box before he catches them. Thinking it was just the cat, he leaves. There, Nao gets to know that Haruka does not hate her, only that he was just surprised at the events of that summer day, dispelling her assumptions. Meanwhile, Sora shows her hatred of Nao, since she's the reason why Haruka has been preoccupied the past couple of days, at home on her laptop.
08 (N3) The Sky, Still Dark
"Nao Kuraki Sora" (ナオクラキソラ)
November 22, 2010 {{{FirstEngAirDate}}}
By now Sora is showing her hatred of Nao in the open, even infront of Ryohei and Nao herself. One afternoon Sora, attracted by the smell of curry cooking in the kitchen, catches Haruka and Nao making love in the living room. Sora throws Nao out of the house, warning her not to see Haruka ever again, since it is the second time she catches the two doing the "dirty deed." She then throws the curry they cooked down the drain, as she only wants Haruka's cooking. Nao becomes lonely after that, and though she wants to see Haruka, she has to hide because Sora is always nearby. However, Haruka is always optimistic Sora will forgive and accept them both, as he, after knowing from Ryohei that she changed, wants Nao to return to being a cheerful, caring, and lighthearted person. Sora lightens up a bit to the sight of Haruka and Nao being together, but still has some resistance, and prefers to distance herself from the two. It is for this reason that she never joined Haruka and Nao along with Ryohei, Kazuha, Akira, and Motoka for the annual summer trip to the beach.

Drama CD

The game release of Yosuga no Sora was supplemented by several drama CDs made available to pre-ordering customers at select Japanese retailers.


Yosuga no Sora has been adapted into a manga of the same title, serialized since the May issue of Kadokawa Shoten's Comp Ace magazine.[6]


The OST for the original game, with music composed by Manack, was released by Sphere on 27 February 2009.

The OST for the anime adaptation, with music composed by Manabu Miwa (Manack) and Bruno Wen-li, consists of both new compositions and newly-arranged versions of tracks from the original game. It will be released on two CDs, subtitled "Arrange" and "New", accompanying the Japanese Blu-Ray release of the anime with volumes 1 and 3 respectively.[7]


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  3. "Eroge Review Yosuga no Sora". Retrieved 2010-09-17. 
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External links

vi:Yosuga no Sora zh:缘之空

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