Tsugumi's husband, Yo-suke, who got involved in investment introduction business, made a debt of 50 million yen... She decided to sign a sex contract with the investor Nakae as a condition to clear that debt. 'If I endure for one month, I can live a happy life with Yo-suke again...' However, at that time, Tsugumi could not imagine her own state a month later. She never thought she would end up hoping that the contract would never end... Losing herself and climaxing over and over in front of her husband with Nakae's c**k...
