Emi, a mother, comes to visit her daughter and son-in-law. She is happy to see the two getting along well. However, one night, she comes across her son-in-law masturbating and hears his tragic story. He has been unable to have sex with his wife, Emi's daughter, for several months. Feeling sorry for him, Emi says she will help him feel better with her mouth and hands, even if it's just for a little while. The next day, her son-in-law sneaks a flirt with Emi when his wife isn't looking. She finally gives in to his passionate desire and gives in to his body. This act, which she hasn't seen in a while, awakens the woman in Emi that she had almost forgotten, and she begins to desire her son-in-law's cock of her own accord...