The parents often work abroad and rarely come home, so Nishikawa stays at their older siblings' house for the convenience of care and going to school. Unexpectedly, when staying here, Nishikawa suddenly becomes a sexual tool to help satisfy the older brothers in the house whenever they come home stressed from work.
Even more surprising is that the little sister does not tell her parents, perhaps she also wants to be involved in such activities, being gently fucked by her older brothers, both satisfying and safe from diseases when having sex with strangers.
Upon returning from school, the schoolgirl was forced by her three older brothers to play the "adult" game of studio 1Pondo, actress Yui Nishikawa, with a duration of 60 minutes.