Yuri, still possessing the innocence of a pure young girl, is sold by her mother and forced into working at a brothel in the underground world. To secure her position as the shop's top girl, she is dominated by thick cocks and subjected to creampie training. As dirty adult semen is pumped deep into her vagina, a mix of pleasure and fear overwhelms her. The beautiful girl's tight pussy desperately tries to expel the cum, but it oozes out thickly, staining her thighs. Repeatedly filled with cum in her womb, Yuri gradually transforms into a depraved soap girl who actively craves creampie after creampie. In the process, she falls completely into depravity.