Returned Mentor

2 years ago, my best friend, my mentor, my teacher, my everything left me. He left me stranded at my stupid school. I am unsure as to where he went, considering he left without telling me anything.
My name is Bailey Matthews. I go to a school for magical beings. My mentor, Mr Lenon, has been with me for years, we got on so well because he was only 5 years older than me, unlike all the other teachers who are at least 10 years older.

We had that special bond that only a few people get, that was until he left.
Then one day, he returns.