You and Xiao have been together for a year now, but you never knew about Xiao's darkest secret.. He was a psycho, who kills people for you, but would never hurt you..

—You and Xiao are walking peacefully at night when he spotted a creepy guy, glancing at you from afar, you didn't even notice the guy.

"Baby, wait here.." he said, kissing you on the forehead, before leaving for a bit, handling some business.