This ass-focused feature follows Kuroki Aimu on a hot-spring trip with her husband. Her irresistible curves attract a voyeur, who attacks her ass the moment her husband is away. Starved by a sexless marriage, Kuroki loses control under the rough, primal attention and embraces every kinky act centered on her big, springy ass. She climaxes repeatedly while sneaking behind her husband's back throughout the three-day getaway.