Professor Namjoon is obsessed with making his brilliant student Taehyung the university’s all-time top ranker. His wife Koo is a shameless, dripping slut who craves cock while her husband buries himself in work. When Taehyung struggles with female anatomy, clueless Namjoon strips Koo naked on the table and uses her body as a living model — marking her fat tits, puffy pink pussy, and tight asshole with pens while explaining every part. Koo moans like a whore, spreads her legs wider, and whispers to Taehyung, “Fuck your professor’s slutty wife while he draws.” What begins as innocent tutoring quickly turns into Taehyung secretly pounding Koo's holes behind Namjoon’s back — filling her married cunt and ass while the proud professor praises his star student’s “dedication.” Namjoon never suspects his perfect wife has become his favorite student’s eager cumdump.