[Reducing Mosaic]TARD-008 Let me fuck your mom, and you can fuck Rika Fujishita's and Saeko Katagiri's mom.

Two pairs of mothers and their sons living in an apartment building, getting along well with each other. However, the sons vaguely questioned how close their mothers were. One day, they accidentally witness a shocking scene: the sturdy brother from the liquor store who always comes by is being fucked by both of their mothers. And the plan that the two sons hatched... Enjoy the unexpected dramatic developments and incestuous swapping.