Narumi, a cool wife, invites her junior colleague from her office days to her home and proposes a husband and wife swap. - She is a perverted wife who invites her partner's husband (her former co-worker) and makes him watch her husband (her former boss) and his wife, who is her junior, cheating on each other while holding his penis. - Even the serious husband shows off his unparalleled love with the erotic invitation of the perverted couple! - Narumi, a perverted wife, gets another man's dick inserted into her pussy and cums with her husband's dick, dripping with excitement and cumming.