DTKM-040 - Incest Mother-Son Swap: Let me fuck your mom, you fuck mine.

A story of two mother-son pairs. Tatsuo returns to his family home while it's being renovated, only to find his cousin Masaru and aunt Chiaki staying there. Tatsuo succumbs to his pent-up desires for his mother, Yukari, while Masaru has already established a twisted, dominant relationship with his own mother, Chiaki. After witnessing each other's incestuous acts, they decide to swap partners.