One morning, the man shares an elevator with his next-door neighbor, Amu, for the first time in a while, and that evening he visits her home with a gift. As they chat about trivial things, the man can't help but slip his fingers into Amu's large breasts, which peek out from under her shirt. He thought Amu, who is known in the neighborhood for being serious, would reject him, but surprisingly she doesn't seem completely opposed, and they end up having sex on the spot.