A bold production targeting couples on a romantic trip, where AV actresses seduce the husband during the brief window of time his wife spends in the hot spring. As the husband struggles to resist the sexy actress's advances, he suddenly hears his wife's voice nearby asking, "Hey, what are you doing?"—sending his tension soaring as he barely manages to resist until the very end. Packed with thrills, the intense mix of pleasure and suspense keeps viewers completely captivated.