Yui and Shinto have lived together for three years, but he hasn’t proposed. Their neighbor Michael, a foreigner, loves working out, often wearing tight shorts that highlight his massive cock. Yui can’t stop staring. One day, while reading, she hears Michael call for help—he’s been bitten and needs her to apply ointment… to his huge cock! The process is anything but normal, as Yui rubs it repeatedly until Michael ‘releases’ into her mouth! Shinto and Michael get along, so Shinto invites him over for drinks. With Shinto passed out, Michael seduces Yui right beside him. Unable to resist his cock, Yui gives in, and they fuck next to her boyfriend. From then on, Yui maintains this forbidden affair, unable to leave Michael’s cock, even if Shinto proposes...