Mako, who lives with her husband's father at her husband's parents' house, honestly hates her father-in-law. Her father-in-law has a vulgar personality and often sexually harasses and plays pranks on Mako. When she tries to talk to her husband about it, he doesn't listen, and Mako is at her wit's end. Just then, her father-in-law finally reveals his true nature... Living under the same roof, this voluptuous, lewd, big-breasted wife has her anus developed by her hated father-in-law's huge cock and falls into anal fetishism.