After losing her key, Yui cannot enter the home she shares with her boyfriend, so she waits at an older neighbor’s place until he returns. When she mentions their recent lack of sex, the man suggests she may be frigid and offers to “check” her. Casual touching soon turns into fingering and cunnilingus. Talked into going all the way by the horny older man, Yui ultimately lets him creampie her—then has to hurry home when her boyfriend arrives.