DTKM-034 - Mother Swap: I'll let you have my mom, if you let me have yours

Two families forced to live together due to house renovations. Tatsuo, a college student, returns home and becomes obsessed with his mother, Ryoko. He ignores his girlfriend and indulges in illicit affairs with his mom every night. Meanwhile, the brothers Yohei and Yasuhiro are also caught in a twisted sexual relationship with their own mother, Yuki. How far will this depraved living situation go?