A documentary closely following the daily life of Rei Kuroshima, who takes care of household chores and looks after her brother in place of her father who is on a business trip. Handling her brother's ejaculation has become part of her daily routine: 'Men get morning wood, right? So I help him release it.' This is the morning routine at the Kuroshima house. Since I was old enough to understand, that's just been the rule in my house. Can't be helped, so I don't think our relationship is unnatural either. Neither resisting nor seeking it out. 'It's too much trouble to think about it, so today I'm sucking my brother's dick again.'
