Chapter 1 My past

This story is about a boy that's one person on the outside but two on the inside - he has two personalities, specifically. There's a certain cause to this 'other person' and it involves his past. Which person will dominate?

NOTE: I DON'T OWN ANY OF THE PICS AND OSTs FROM DIFFERENT ANIMES. NO COPYRIGHT INTENDED. JUST A THING FOR THE READERS TO BASE THE CHARACTERS' LOOKS.