Son secretly peeks at his mother changing in the bathroom. Later, after sniffing her underwear and returning to his room, the mother walks in and says, "Hey, I know you were spying on me in the bath just now. I know everything." The story unfolds from there. The tension and strange atmosphere created by the son's curiosity and the mother's reaction are the highlights. A small incident in daily life blurs the boundary between the adult and child worlds, producing a unique and captivating mood.