Mina is a faithful housewife in her second year of marriage. She lives with her kind and hardworking husband. Her only complaint is that her husband is indifferent and not very proactive in their sex life at night. In the same apartment building, she lives next door to a middle-aged craftsman named Ikeda, who is quiet, taciturn and has an intimidating appearance. Whenever she greets him, he only responds with a brusque mutter. However, Mina, who is a little sexually frustrated, finds her crotch getting wet from the smell of male sweat that he gives off. And then, one day...!