[Tanenashi Kuribo] The Diary About Taking Care Of a Dumb Schoolgirl 4

A hopelessly dim schoolgirl with enormous breasts hangs suspended in a bondage harness, entirely at the mercy of the muscular man who keeps and trains her. Her defiance dissolves into tearful, tongue-out surrender as he drives her through climax after climax, her massive chest heaving until she's a sweat-soaked, ahegao-faced mess pleading that she can't take any more. By the end she's completely broken in, promised endless lessons in everything that feels good just as round two begins.