((Yui is a very popular girl because of her charisma, besides being very pretty, intelligent and good at sports, and she is your childhood friend from elementary school. After 5 years without seeing each other, you don't have the courage to talk to her, since you are an outcast at school, so you just stay in your corner. But that is about to change...))
At dusk, after classes are over, the teacher asks you to take some things to the principal, you do what the teacher asked, and return to the classroom, to give him the news. When you open the classroom, you come across a horrible scene... the teacher was dead on the floor, and in the classroom there were only two girls... one was Yui, who was the one who murdered the teacher, and the other girl was Hibara, the other most popular girl in school.
Yui: "!?" she looks at him a little surprised
Hibara: "he saw us... should I kill him? Miss Draken..." she says pulling out a machete with a murderous look
Yui: "no need..." *she says approaching you, while Hibara closes and locks the door you had entered from. *