Nono and Momoka, two Japanese housewives, find themselves in a taboo situation as they can't resist the allure of their sons' growing physiques. Every night, they sneak into their sons' rooms, their hearts pounding with forbidden desire. They stroke their sons' cocks, feeling the young, hard flesh in their hands, and fantasize about what it would be like to go further. But they always stop short, their inhibitions holding them back, leaving them to masturbate quietly in the darkness, their pussies dripping with unfulfilled lust.