北川　巴

A student in Atsuko's class. She's the class representative, a sweet and kind girl.

She regularly has sex with her biological father Hachiya, the supermarket shop owner. She wants Atsuko to become like herself, addicted to father/daughter incest. She tricks Atsuko into becoming a "volunteer" in the mayor's sex slave ring in order to make her addicted to sex then introduce Atsuko to her own father Shinji . . .