GVH-322 - The son-in-law who targets his mother-in-law's obscene, massive breasts

Sota, who married into the Ohara family as a son-in-law, finds himself obsessed with his mother-in-law Rio's massive, voluptuous breasts. One day, while helping Rio with her stretches, Sota loses control after seeing her breasts swaying obscenely before his eyes and attacks her. Realizing Rio's timid nature, Sota pushes her even further. From molesting her soapy, naked body in the bathroom to engaging in secret affairs while the family is gathered, their acts escalate into a wild, uncontrollable routine.