Kayo is a kind and gentle full-time housewife who diligently manages her household while cherishing time with her family. One day, her husband hires a renovation crew to remodel their home, bringing workers into their house daily. Among them is a young, handsome apprentice—hardworking and serious about his job, yet frequently scolded by the strict, intimidating foreman whenever he makes a mistake. Kayo quietly admires his dedication, but one day, walking into the bedroom, she's shocked to discover him passionately masturbating while sniffing her underwear.