Yoshugara Hikaru and his younger sister, Mioto, were Sugihara Hakuro's childhood friends, and his sister Hakuro was named Akimi. Even though Mioto and Hakuro love each other, Hikaru also secretly falls in love with Mioto. One day, Akimi walked into Hikaru's room and found that Hikaru was busy coli while peeping at Mioto and Hakuro who were being screwed. Akimi requested that Hikaru find a way to end his brother's relationship because Akimi also liked his brother. Hikaru refused the request then Akimi refused to ask people about when he was coli. Hikaru lost his temper and raped Akimi.