Non enjoys a happy age-gap marriage, but her husband's impotence has left them without sex for a long time. He finally reveals his cuckold fantasy and asks her to sleep with another man. Though troubled, Non decides to grant his wish and tries to seduce their neighbor Kazuki. He desperately resists her blatant advances, while she summons the courage to push further but cannot take the final step. Unable to wait any longer, her husband urges her to go straight to Kazuki's room, leading toward open infidelity and creampies.