Tsubasa Mizuki works in a major company, but her co-worker and boyfriend tells her during sex "I lost my hard-on because you're not into it" and treats her coldly. Tsubasa feels down because she's happy with the way things are even if she doesn't cum during sex, so she listens to the advice of a friend and buys a cute adult toy to train her body with. However, it's found out by her boss...?! The sweet words of Tsubasa's boss and his sadistic foreplay makes her body shiver all over like it's never done before...!