Long sleeves hide scars (Zack X Reader)

TW: SH FOR THE WHOLE BOOK. Note: This is a book i wrote while i was struggling with SH so i could relate to a story. If mentions of SH trigger you, do not read this. You are the killer of the floor B7, and you are cutting yourself. You met Rachel and she made you believe that you can escape this place. You met Zack on...