"My son is timid, so his balls are small too..." These words were casually spoken while having tea with her housewife friend Haruka, but Toshie couldn't help but think that it was something that didn't concern her. Toshie, whose husband is often away on business, was also dissatisfied with the fact that not only was their sex life scarce, but his balls were small and he produced little semen. One day, when Kazuma, the son next door, came to pick up something his mother had forgotten, he couldn't help but think about what Haruka had said during the day and took off his pants... "They're bigger than my husband's!"