Idol Gumi Nijiiro volunteers for training because she loves forced deep-throating and wants to become skilled enough to feel pleasure in the back of her throat. The cheerful performer begins with playful throat-stretching using a custom gummy dildo, but the lesson steadily escalates into punishing drills hard enough to make her vomit. Merciless huge-cock thrusts bulge her throat and bring her to tears, stripping away her smile and composure through one brutal deep-throat session after another.