A shocking training story featuring the pure and innocent young wife Miyuki, who unleashes her hidden masochistic side in pursuit of the abnormal pleasure of binding her own body. Trapped in a mundane and boring daily life, she found excitement by tying herself up with rope and posting the images online. But eventually, that became insufficient. Unable to suppress her desires any longer, she pleads with a professional tight-bondage expert to train her. Despite fears of destroying her ordinary life, her masochistic urges prevail, driving her into a bold new realm of submission.