Akari is a top-class honor student who plans to go on to a famous university. During this winter break, she visits her empty school to receive private lessons from her teacher, Oshima. However, when she arrives at the staff room, Oshima asks her for a favor. It is to ask her to help a reclusive student in her class, Zuozi, with his studies. Though suspicious, Akari heads to the designated place in the school, but... She falls into the trap of a devilish teacher and a group of scum, and is subjected to an inescapable gang rape hell and mind control. #YoroP