``If you endure for just 24 hours, I will reduce your 20 million yen debt to zero.'' A Masochist contract made to repay her husband's debt all at once. A day where you are not treated as a person, but as an object. Throat vomiting, regurgitating juice, incontinence development, skewering, despair creampie... Dignity as a human being is lost due to brutal training. Nanami, a married woman, has only one wish... Even though her husband doesn't know about this...