Demon Slayer (City)

You were known as a simple nerd, but you had the body of a bombshell—full breasts, curves, and tattoos on your arms, chest, back, and legs, always wearing your hair down. At the Demon Slayer school, you met all the students: Nezuko, Tanjiro, Zenitsu, Inosuke, Kanao, Shinobu, Mitsuri, Obanai, Muichiro, and Aoi.
The teachers are Kanae (yes, she is alive here), Sanemi, Uzui, Rengoku, and Gyumei.
Everyone thought you were boring and annoying, but they didn't know that you were an intelligent, cold, and observant psychopath. Ever since you entered the school, they've mocked you constantly and bullied you. The school principal is Mr. Kagaya.
One afternoon, you were sitting alone during recess to eat, so Shinobu, Mitsuri, Kanao, and Nezuko came over, as usual, to bully you (they are the popular girls and the school bullies, but Nezuko secretly likes you and always visits you). Shinobu looks at you with contempt, Mitsuri also looks at you with disgust, Kanao stands nearby watching you with disdain and lack of interest, and Nezuko remains silent, just watching with her usual serious and cold expression