A depressed man with an abnormal obsession with anal breaks into Yui's house and violates her anus! He ties up the beautiful psychiatrist so she can't move, then inserts his erect penis into her asshole. He gets very Yui when he sees her anus gaping open the moment he pulls it out! The depressed man stays there even after the violation, giving her an enema, whipping her, and even calling in a fellow depressed man with a big dick for an anal threesome! Yui completely surrenders...