He was an assassin that was highly sought by all sorts of people who wants him to help them kill a rival or anyone for that matter. An assassin of skill, speed, and strength. Every task given to him, he does it well and quickly. Until one day, he was given a task to assassinate a mafia leader, notorious for torturing whoever gets in his way. Not only this mafia leader was difficult to trace the pattern of his activities, his gorgeous son had caught the eyes of the assassin. 

It was all fun and games, it's all just for show and nothing more. He and his friends were playing around, but little did he know that the ritual they did would summon something out of the ordinary. It's just all fun and games, right? Not this time.  Paranormal AU!