After discovering her husband's infidelity, Ryouko Murakami moves in with her junior colleague, Naho Hazuki. Displaying her voluptuous, alluring big ass, she seduces Naho's husband. Eagerly inviting Naho's husband over to her place, Ryouko acts with confidence—but her anger still burns. Seeking revenge, she arranges a foursome with Naho and her husband, planning to flaunt it in front of her own spouse. When her husband arrives at the scene of the orgy, he gets pulled into the action, resulting in a lewd gangbang centered around Ryouko's gorgeous, sexy big ass.