At a sports club's training camp at a ryokan, the kindhearted senior female manager takes on the challenge of helping a troubled junior member with his virginity and premature ejaculation! After their first mixed bath together, the junior member instantly gets a full erection, much to the senior manager's delight. Despite her embarrassment, she diligently performs hand-free blowjobs to help him overcome his premature ejaculation, making him cum repeatedly. Even after that, the persistent erection of the junior member's cock makes the senior manager's large breasts ache, and she gently guides him to continuous creampies with her fingers.