- A son who bought a suspicious "horse seeding stimulant" found on the Internet and mixed it with tea to try it on his mother-in-law Mio, who has become a new family member. Then, the mother-in-law begins to sweat from all over her body, wiggle her hips, and breathe heavily. Son smiling. - When she offers her, her eyes moisten and she sucks it vulgarly with a lustrous expression. - A mother-in-law who can not suppress the pain of her has forbidden seeding sex with her son. The son calls his friends and the two of them enslave their mother-in-law.