Honestly, would tell people to not bother reading it. It starts off great and they introduce so many characters with such good potentional for a facinating story but the plot keeps referring ambiguously to the past, question are all left unanswered. Everybody tells the main character some sort of betrayal took place but when questioned, give very vague responses. You keep reading because a part of it draws you in but you will constantly get frustrated.
Uragiri wa Boku no Namae wo Shitteiru