Living together with Yoshio, her husband's stepson, stepmother Honami finds herself increasingly aware of him as a man, causing inner turmoil as she struggles to conceal her feelings. Meanwhile, Yoshio also harbors secret desires for Honami, caught in a web of complicated emotions. Tempted by advances from friends and consumed by fantasies of taking Honami sexually, Yoshio is tormented by jealousy. The intense, conflicting emotions between them are reaching a breaking point—now, their fate unfolds.