Kanna is normally a gentle and calm person, and upon hearing about an ordinary hot spring trip, she looked forward to spending a pleasant time with her lover. However, her lover, driven by a desire to train and dominate her, takes her to a hidden inn notorious for voyeurism and orgies. There, her humiliation begins with exposure, public urination, and drinking urine, gradually escalating to bondage, body writing, and eventually group sex in the outdoor hot spring. As Kanna slowly has her values reshaped through these experiences, she completely falls into the path of masochism.