Five days of cohabitation with my cheeky playhood friend Hikari Takifuyu

The movie explores a taboo relationship between a brother and his younger sister, Hikari, who are forced to live together for five days while their parents are away. As they navigate their new living arrangement, they begin to develop romantic feelings for each other, leading to a series of intimate and explicit encounters. The story delves into the complexities and tensions of their forbidden love, as they struggle to reconcile their desires with the societal norms that condemn their relationship.