Saki was worried about her son's education during his adolescent years. Recently, she noticed he had been frequently purchasing suspicious adult items online. One day, when she peeked through his bedroom door, she found him seriously pleasuring a lifelike love doll. That same day, his school teacher brought over a female student, claiming that her son had been stalking her and even touched her breasts. Concerned that his actions would escalate into sexual offenses, Saki decided to talk some sense into him. She proposed that instead of harming others, he could use her body as a substitute for masturbation. As his out-of-control desires took over, he agreed to release his tension by helping himself to her motherly charms... Little did they know, this wasn't just about sex; it was about fulfilling each other's needs in their twisted daily routine.

咲は思春期を迎えた息子（義理）の教育で頭を悩ませていた。最近、ネット通販で何やら怪しげなアダルトグッズを頻繁に購入している様子だ。子供部屋のドアから秘かに覗いてみると精巧なラブドールを真剣に撫でまわしていて不気味だった。そんなある日、学校の担任教師が女子生徒を連れて訪れる。息子はその女子に対してストーカー行為を行い、胸を揉むなどしたらしい。これ以上エスカレートすると息子は確実に性犯罪者になると思った咲は彼を説得する。「お義母さんのおっぱいを代わりに揉みなさい」暴走する性欲を抑えるために自らのカラダをオナホにするように提案するのであった…。「これはセックスじゃない…息子のオナニーのお手伝いなの」彼のギンギンに勃起した肉棒を受け入れ、性処理してあげる咲お母さんの狂った日常。