Your son doesn't ejaculate prematurely.

Ichika was unsatisfied both physically and mentally with sex with her selfish husband. One day, Ichika was having a meeting with Yumiko, the mother of the Takada family next door, when Yumiko's son Tatsuya appeared. Ichika is surprised to see that Tatsuya has transformed into an adult man without seeing her for a while, but Yumiko continues to treat him like a child... Ichika, who feels sorry for Tatsuya, happens to peek into Tatsuya's masturbation and learns that his lower body has become an adult as well...