Troubled by a sexless marriage, Monami receives a "front-hook bra" from her thoughtful younger sister. With no opportunity to wear it, Monami grows restless—until one day her husband's subordinate, Sakamoto, visits their home. Tempted by Monami's big tits, Sakamoto becomes aroused, but due to his lack of experience, he fails to unhook her bra and the encounter fizzles out. Determined, Monami thinks, "Next time for sure," puts on the front-hook bra again, and waits eagerly for Sakamoto's next visit.