A college student's daughter returns home with two boys, Hiroshi, her boyfriend who she started dating in the same club, and Takuya, a fellow club member. It turns out they've gathered in her daughter's room to discuss what to do in the upcoming school festival. Ayane, a chaste single mother, welcomes the young and cute guests with a big smile and some special sweets. That night, as the conversation progresses, Hiroshi, her daughter's boyfriend, ends up staying over...