Disclaimer: Owari no Seraph does not belong to me nor do the characters or plotline. This story starts off from the scene where Mika takes Yuu away and suffers from bloodlust- SPOILERS GALORE ahead so read at your own risk. It is a spin-off of the manga/anime where Yuu decides to run off with Mika instead of staying and fighting, leading to a drastic turn in events.
Blood. Such a word felt like a curse to even say it, but now it hummed through Mika's mind constantly like a broken record. The word seemed to tattoo itself to his soul and overwhelm everything else, filling him with insatiable greed and desire. He had gone for three long years without so much as a drop of human blood, his stubbornness and love for his family overpowering it every second of every day. In the end, Krul Tepes' blood had not been enough, something he should have expected.
Mika stated down at the unconscious boy in his arms, kneeling on the cracked road. Vulnerable, left to the crows they both were. One wrong move and he could get himself and Yuu killed in an instant. All it took was a Horseman of John and they were powerless- Mika didn't have the strength to fight and Yuu had been unconscious for a long few hours now. His grip tightened around the boy's torso as he held him in his kneeling lap, lowering his head.
A sound, a noise from the left. His head moved fast and before he realized it, so did his body. He continuously forgot how strong he was as a vampire, but right now Mika worked on autopilot, healthiest for blood and desire to help Yuu overwhelming all sense of dignity or strength. He stumbled through the doorway after his prey, movements slow and tinged with desperation. His eyes found his target and he lunged for it mercilessly, his long gloved fingers curling around the child's throat and cutting off his airway.
"Help me!" The child's feeble cries were directed athis comrades, but it seemed they were selfish enough to put themselves first as Mika heard their feet patterning in the opposite direction established orders to run uttered under their breath. He could hardly hear over the rush of blood in his ears as he leaned towards the child's throat, neighbouring to expose two sharp teeth protruding from his others aimed for his throat. If he could drink some blood, just a little, he would be able to tell Yuu what he had to tell him, he could still protect him from those horrible humans. A desperate hiss sounded from his throat as he leaned closer...
"M-Monster!"
Funny how one word was enough to break the spell cast over him as the reality of the situation sunk in like poison in his veins. He visibly flinched as his grip loosened and he pulled away from the child, who took the opportunity to scramble away towards his traitorous comrades who would only end up leaving him in the same way come anotheropportunity. That was right... if he drank blood, he truly was a monster. Yuu would hate him if he didn't already for the bastard creature he had become.
"I... I still can't," he whispered as he stumbled backwards, collapsing against a drawer in the gas station he he dragged Yuu into, his breathing labored and pained. He pressed a hand to his mouth, the feeling of his teeth disgusting him even more as he started at the blood on the ground dripping from his deep injuries. "Sorry, Yuu-chan. I... I...don't want to... become a... vampire." He laughed without humor into his palm as he hung his head, the pain so intense he felt like he was on fire. "I finally got Yuu-chan and yet...what exactly am I doing...?"
A/N: Will pick up in Yuu's POV with his dream!