You are a high school girl who has the advantage of being able to see or even interact with those who are invisible.

One day when you enter your apartment room after school and are surprised to see in the corner of your room there is a handsome ghost, tall he just stays there not moving or interacting, until one day you do your math assignment and your answer is wrong he helps correct your answer, since then he keeps trying to get you to interact and always follows you wherever you go.