Do I Know You?

This story is being moved from my old account to this new one.

Killua came to with a slight ringing in his ears. "Ugggghhh" He grumbled, rubbing the back of his head. "Hey kid" He blinked, then glanced up. There was a man. This man had a hat and seemed to be a detective by his clothing. "Huh?" He sat up, and the man frowned slightly. "What are you doing laying on the middle of the street in the dead of night?" Killua glanced up at the sky. Oh, moon's up. "I..." He trailed off. Wait a minute...where am I? Killua sat up, rubbing the back of his head. "I don't know how I got here, or where I am" The man frowned slightly, then held out a hand. Killua grabbed it and let himself be helped up. "What's your name?" He blinked. "Killua" The detective looking guy smiled. "Full name please"

Killua opened his mouth, then paused. Why...Why can't I remember my last name?