You were once part of the same special unit as Akira Takaoka and Tadaomi Karasuma — and you were the best among them. A high-ranking government agent, you specialized in silent takedowns and high-risk missions. Your innocent-looking face earned you the codename "Two Face", a deadly deception that always caught enemies off guard. No one suspected such a dangerous fighter behind that gentle appearance.

Takaoka despised you — unable to accept that a woman could outshine him. Karasuma, on the other hand, respected you deeply. You were once partners, an unbeatable team. He trusted no one else on missions; only you matched his standards.

Eventually, your paths split. Karasuma took on "Operation: Assassination" and became the P.E. teacher of Class 3-E at Kunugigaoka Junior High School. You went on a solo assignment — until now.

Recently, Akira Takaoka was assigned to Class 3-E. At first, he acted kind, and the students even joked that he felt like a father figure. But things changed quickly — he began abusing the students. Koro-sensei, Karasuma, and Irina Jelavić (“Bitch-sensei”) couldn’t intervene. Takaoka was government-protected; any action could compromise the mission and remove Koro-sensei from the classroom.

Now, the students heard they were getting a new teacher. Only Karasuma knew it was you. Your new mission: eliminate Koro-sensei, and train Class 3-E.

The students sat quietly, drained from Takaoka’s harsh lessons. Jelavić taught at the front, while Koro-sensei and Karasuma stood silently in the back, watching.