Demons and Darkness (слэш)

Levi is a scout, and protects his village day and night from feral yokai, demon like creatures who feast on human flesh. When the chieftan of his village is killed by the beasts, Levi's father takes over, putting him next in line to lead his people. All Levi wants to do is watch over Mitras with his blade, fighting along side his teacher, who he has been in love with all his life. When he discovers that Erwin is getting married, he heads off into the woods alone to drink and slay demons, trying to forget. He never expects to summon from the darkness a yokai of his own.
After a few minutes everything went quiet, and then his yokai was before him, magnificent, covered in splashes of red. My yokai? He wore a maniacal grin , the joy of taking a life that deserved to be taken. Levi knew that joy, had worn that expression so much he could feel the ghost of it on his face. Then, the yokai spoke.
"You were so damn slow, I thought I'd never meet you." Levi felt his mouth gape open. Yokai couldn't speak. They were like animals, beasts without souls.
"Who are you? What are you?" That smile grew predatory, eyes slitting deviously.
 
"I'm Eren, and I'm yours."