This series features an intense challenge of entering a men's hot spring bath wrapped only in a towel. Legendary S-rank actress Yuna Mizumoto takes on a series of erotic missions, including "washing men with her breasts and mouth" and "performing masturbation shows." The explicit content also includes sex scenes in sheer gym uniforms, one after another. Though Yuna's embarrassment pushes her shame meter to the brink, her irresistible charm causes the male guests to erect one after another. Her captivating, million-dollar body drives viewers into a frenzy through this thrilling series.