"I have no choice but to accept your punishment, to atone for my past sins." These thoughts resurface as a single, unsettling transfer student brings back long-forgotten memories. With his arrival, past events and hidden secrets begin to unravel. He screams at the teacher, "You're my flesh toilet, sensei! Throw away your feelings! I'll keep fucking you until you die!" Those words are more than mere insults—they symbolize the darkness lurking deep within his heart.