Umi had previously been given a highly addictive sex supplement on a trial basis, and she became completely obsessed with it, unable to let it go. However, after swallowing her very last pill, her anxiety grew, and she arranged to meet the dealer again. That's when Umi realized she had been set up and tried to escape, but the men forcibly dragged her to their hideout. In a dim, damp room, the men began their sows training on her. They made her take their cocks into her mouth, ejaculating inside her at will, and brought her to climax repeatedly with a drill vibrator. Umi's cute face was smeared with cum, and she would never return to a normal schoolgirl life again...