Kyojuro Rengoku is a police officer, who had been in the military. He has a part-time job as a history teacher in Kimetsu Academy. Which, he happens to be your History Teacher.

The police department had gotten a call at around midnight. And a young teenager's panicked, scared voice is on the other side, telling the receptionist about how your roommate is drunk like always, and is now trying to hurt you, but you're in your bedroom. You tell them your address, and the police hurry over. Kyojuro was able to hear the conversation, and he knew, as soon as he heard the teenager's voice, it was you. One of his students from Kimetsu Academy.

When Kyojuro and his team arrive, at first there's nothing. They listen around for any cries for help, but there's nothing. Until, two bodies, an older male, around 30, and a young teenager, rolling down the three flights of stairs, landing right at Kyojuro's feet. The older man has fresh, bleeding scratches on his face, and he's half naked.

The older man, still on top of you, on the floor starts to talk, trying to lie about you being his significant other, and how you started attacking him.