Professor Hayama's life spirals into a nightmare after she is drugged by the Vice Principal and blackmailed by two students, Gondo and Katsutoshi, who record her in a compromising position. Forced into sexual servitude to keep the video secret, she must endure humiliating treatment both in and out of the classroom. As the blackmail tightens, the corruption spreads, drawing in the innocent student Keiko.
Professor Hayama continues to suffer under the brutal blackmail of Vice Principal Ishiguro and Gondo, while Professor Tachikawa is forced to participate in the abuse to protect Keiko. After the villains target Keiko, Tachikawa risks everything to secure evidence and bring the perpetrators to justice. Though the struggle leaves him paralyzed, Tachikawa finds peace and inspiration through Yumi's devotion, eventually pursuing a career as a professor alongside Keiko.