Reina Matsushima, a sassy, modern G-cup schoolgirl, transforms into the class's sperm receptacle. Helpless and restrained, her body is toyed with by the boys, who forcefully thrust their dicks inside her despite her distressed expressions. She pleads desperately, "Please, don't cum inside me!" but the boys ignore her cries, ruthlessly pounding into her and filling her womb with creampie after creampie. Reina's pussy becomes completely saturated with semen, vividly overflowing as the cumshot spectacle unfolds.