Michiko, a widow who raised her son Shoji all on her own, finds her life taking an unexpected turn when he brings home a girl for the first time. Accidentally overhearing their conversation, Michiko is overcome by an unfamiliar surge of jealousy. Until now, her heart had remained pure and untouched—but those feelings awaken a passionate inner conflict she's never known. Unable to suppress her emotions any longer, Michiko makes a shocking decision: to give Shoji, a virgin who knows nothing about women, his first sexual experience. A stunning story unfolds, where innocent affection and profound love collide.