A certain summer day. Hikari, who lives on the same floor, stood in the corridor looking troubled. When greeted, it turned out her fan was not working properly. “Shall I take a look?” he offered out of kindness, accepting lightly. Thinking it over, her husband was away at work in the steamy room of the apartment complex. Hikari’s open chest… the dripping sweat was strangely erotic… and he found himself having unexpected expectations.