"Tsubasa" was supposed to marry her beloved husband and live a happy life, but she was troubled by her delinquent brother-in-law who lives with her.She was disgusted by her brother-in-law, who wanted to do whatever she wanted, such as asking her husband for money to play and sexually harassing her, but one day her mind was switched with her brother-in-law.She can't even tell her husband, and Tsubasa is in anguish.However, her brother-in-law, who has tasted the body of a woman for the first time in her life, plays with Tsubasa's mind and body.