DTKM-029 - Swapping Moms: I'll let you fuck mine if you let me fuck yours

Tatsuo, who lived alone in Tokyo, starts living with his cousin Yasuhiro and his aunt Yuriko due to house renovations. Tatsuo, who couldn't stop having lewd fantasies about his own mother, Shinobu, eventually crosses the line. He gets caught by his cousin Yasuhiro, who turns out to be doing the same with his own mother, Yuriko. Sharing their dirty secrets, the two sons decide to execute a depraved plan to swap and sleep with each other's mothers.