Yura has been married to a man with a stepchild for two months. Although she is on good terms with her husband, she is still troubled because she cannot build a relationship with her son-in-law, Tomoya. One day, Tomoya, who has a strong sexual desire, asks her to help her masturbate. Out of her joy at being told her mother for the first time, Yura helps her son out as her mother. However, Tomoya couldn't stop with her one-time ejaculation, so he took advantage of her and asked her to help him again and again. At first, Yura was swept away because she couldn't say no, but before she knew it, she asked for help.
