Since losing her husband, Sakura has been raising her son Shosumi alone. Due to their difficult financial situation, Shosumi has been a dutiful son, working part-time instead of playing. However, being a boy of that age... after accidentally seeing his mother Sakura's naked body in the changing room, he can no longer hide his interest in women. When Sakura finds out about her son's secret desire, she offers herself to him as a way to express her feelings and teaches him sex. Starting with gentle kisses, using her large breasts to completely envelop her son's penis in a paizuri, and finally moving on to actual intercourse... The mother's special reward develops their relationship into a forbidden one.
