Synopsis: Anata no Imouto

“Be my ideal girl… It has been two months since childhood friends, Yuuka and Kouta, began their relationship. However, because of their lack of experience, their “first time” together does not unfold as expected. Enter Koutas younger sister, who is resolute in her mission to guarantee the happiness of the couple… at any cost… A boy, a girl, and his younger sister… All entangled in a love triangle that is both sensual and immoral, making you want to turn away… Yet you will find it impossible to do so…