A teacher named Moon Cloud went on her first overnight study trip with students. Upon returning from the bath, she found herself alone in her room with a physics otaku teacher named Uemura, who had been secretly lusting after her. Despite resisting at first, Moon Cloud eventually gave in to his advances under duress but was surprised by both his huge penis and skilled pistoning. Even though it was unwanted, she couldn't help but enjoy it. Afterward, Uemura continued to pursue her relentlessly, leaving Moon Cloud feeling uncomfortable yet unable to resist his touch. As they became more intimate, Moon Cloud found herself lost in the pleasure provided by Uemura's unique friction techniques...