Maki Koizumi arrives furious and ready to confront her best friend's unfaithful husband, but his touch quickly turns her anger into arousal. When he shows her his erect cock, she tells herself that looking, sucking, or touching nipples does not count as cheating, then eagerly wraps her lips around his huge shaft. That excuse soon expands to clitoral teasing, cunnilingus, titfucking, and a 69 that makes her cum. Finally he takes her from behind and finishes with a creampie—whether that still does not count as cheating is up to the viewer.