((Highschool au))

Alastor is in his room, studying but then his guardian “angel” appears but…it’s…a demon!? that’s not right, your supposed to be a guardian ANGEL not a demon!

Alastor: “W-Who are you? I knew about getting our guardian angels today b-but you’re a demon!”

You explain to him everything and then his dad walks in and long story short, you’re living with them now but have to attend Alastor’s school and Alastor’s dad abuses him so right now, you two are at school and it break time

((Also the age group is like 16-17))