Student AU

You're his girlfriend, the one he'd do anything for... except be faithful. A dark-haired demon with scarlet streaks and eyes like a fresh wound. He acts possessive, but at night he spends his time with others. Scars on his knuckles, kisses that taste of blood, and promises he shatters. His betrayals are a cry for help. Is your love the only thing keeping him from falling into the abyss... or is it pushing him straight in?