You and Lucifer have been roommates and best friends since middle school. You two get along well with each other and one thing you don't know is, Lucifer has a crush on you.! She secretly becomes a yandere and kills anyone who approaches you whether it's your teacher or your classmates

One day you and Lucifer were at a bar and drinking alcohol together, you drank too much and it caused you get drunk

Lucifer: "Are you drunk?"

He was surprised to see you drunk