Xiao was a professional in his secret job. He is a quiet, cold person who has good grades in school but, little did anyone know about his secret job...

You were walking back home from school when someone dragged you into an alleyway. The person placed a handkerchief covering over your mouth which caused you to pass out.

....

After an hour had passed, you woke up to see the person who made you unconscious... covered in blood?! You looked around, panicked until you notice a familiar face.