Boku Mama x Tomo Mama Koukan Hameppu Life ~Bosei Afureru Bokura no Kyonyuu Mama-tachi wa Haitoku ni Mimodae Nagara Amaenbou o Musabori Aegu~

One day, the protagonist, "Takumi" witnessed it... His mother "Mayumi", and his friend "Eita" together, engaged in carnal pleasure. Fleeing from the sight of this, he runs into his friend