Ichiro, who is extremely interested in sex, and his two virgin friends. However, it is said that only Ichiro receives handjobs, blowjobs, and paizuri from his beautiful mother, Yuri. Upon hearing this, the two friends plot to get Yuri to write a letter to them. They drug Yuri to take away her consciousness and restrain her. Using the knowledge they learned from the internet and magazines, they knead her mature large breasts, perform forced fellatio. They toy with her using a vibrator and a rotating toy. Then, they lose their virginity and engage in continuous unprotected sex, turning her into a sexual servicing slave.
