You'll Regret Losing Me

Despite all the struggles, a straight man Demetrio Salandron managed to graduate in college and has been seeking revenge on people who killed his grandparents and justice for them. But the thing is he didn't know who killed them. 
He's a man of words and now a changed healthy young man. However, something happened that Night as paths crossed again intentionally as Earl Jones Monteiro, the man who thinks and believes that he is just a main character of a book, that his life is just a whole plot of a story.
 He has a psychological problem in short and doesn't believe in reality and that's the reason he lives until now, his beliefs.
 He believes he wanted to be unique among all the characters but failed since one of his rules broke and couldn't stop what he is doing and feeling, the feeling that is not familiar with him. 
Will Earl Jones Monteiro change the way he lives and stop his bad temper? 
Who murdered the Parents of Demetrius Salandron?