Yuki Mayu, obedient crossdressing school student

Because of her cuteness, Mayu is confined by an acquaintance's older brother. A masochistic man is scared, but excited to be treated like an object. At some point it was converted into a meat toilet to relieve sexual desires... Her asshole has been trained to the point where she can no longer survive without a man's semen. He proceeds to the path of sex slavery himself for pleasure.