Narumi, a hot wife, invites a junior from her days as an office lady to her home and suggests swapping wives. She invites the husband of the other woman (a former colleague) over, makes him watch her cheating sex with her husband (her former boss) and grabs his dick. The serious husband also shows his sexual prowess at the perverted couple's overly erotic invitation! Narumi, a perverted wife, gets a stranger's dick shoved into her pussy and cums with her husband's dick, drooling with excitement.