Hit man (black butler fanfiction)

An angel part demon, grown to be shut out by other demons and beaten almost to death by them when he did something they didn't like. But like his respected father he always stood with his head held high, not taking anything to his heart. Growing up he shunned everyone around him, even killed to be hated and not letting a single demon or human near him. His name is Michaelangelo Houghtling.

Growing up he would train by himself with the sword his father gave him, and as the centuries passed he started to fight back. Killing in the prosses, he earned the name the demon's angel, ironic really.

Soon, after many decades pass, his anger wasn't as strong as before. But he covered it up with his playful ways and strange slangs.

What will happen when a certain demon enters his life after a mission gone a bit differently than usual?