Kokoro (コ・コ・ロ…?) is an adult bishōjo game released on December 4, 1998 in Japan by Aaru. The title is exactly pronounced Ko Ko Ro. Kokoro means "heart" in Japanese, and the title represents the word "heart" being broken. The game deals with incest, sexual abuse, homosexuality and murder.

The game was once banned of sales and was later re-released without consent of the Ethics Organization of Computer Software (EOCS) on January 29, 1999, changing a part of the story.[1] The characters' relationships were changed from blood relatives to the family-in-law. During this period, the game brought record prices in the secondhand market.[1] A novel adapted by Kakeru Sawano was published in June 1999.[2][3]

The first part and the latter part of the game's original video animation (OVA) adaptation were released by Alice Japan on December 21, 2001 and on June 21, 2002 respectively.

There are two sequels to the game. The second volume Kokoro II, drawn by Yuna Kagesaki, was released on August 25, 2000. The final volume Kokoro 0 was released on May 28, 2004. In the 2006 summer comiket, Yuna Kagesaki sold a manga that dealt with the game Kokoro II.[4]


A boy was raped by his father and mother. He had sexual intercourse with two sisters. One sister killed her father and mother. He murdered her and subdivided her body with an ax. He still engages in sexual acts, but the repressed memory gives him pain.


Sōji Kuonji
He is an original hero. He had sex with his family. He murdered his sister. He doesn't enjoy sex. After he marries Mizuki, he becomes kindhearted. He becomes the president of the family business.
Asuka Kuonji
She is Soji's younger sister. She helps him to dismember their sister Kasumi. She changes her name to Asuka Yūki later. She becomes the vice-president of the company.
Kasumi Kuonji
She is Soji's older sister. She murders her parents and is subsequently murdered by her brother. In one of the ending of Kokoro 0, the prequel, is revealed she was in fact her to give birth to Soji.
Ruri Kuonji
Soji's mother - Her maiden name is Ruri Yūki.
Genzaburō Kuonnji
Soji's father. He was the president of a company.
Makoto Sena
She is senior of Soji. She becomes an office worker and she doesn't marry. She trains Subaru Kuonji.
Akira Sena
He is Makoto's brother. He loves Soji and his sister.
Akiba Mayumi
She loves Soji.
Christine Russell
She is an overseas student.
Mizuki Sakakibara
She is Soji's teacher. In the sequel, she married Soji.
Subaru Kuonji
He is the son of Soji and Mizuki.
Chizuru Yūki
She is Asuka's daughter. Her father is unknown.
Sayaka Saotome
Kasumi transmigrates her.


  1. 1.0 1.1 (Japanese) "Gamers Life vol.14". magmag. 1999-01-31. Retrieved 2008-11-24. 
  2. (Japanese) "Kokoro... Pumpkin novels vol.9". Retrieved 2008-11-24. 
  3. Script error
  4. (Japanese) Kagesaki, Yuna. "コミックマーケット74". Yuna Kagesaki Official Website. Retrieved 2008-12-05. 

External links

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