At age ten, kids are chosen to be heros. The whole ordeal. Powers, training, yada yada. You started fighting about a year ago and you and the villain (Calvin but you didn't know that). They were great at hiding their identity, unlike you. They had already found out everything about you. From your exact eye colour, to date of birth, to name, to your favourite ice cream flavour -or if you even liked ice creams. And he had everything planned out now.
He planned to use a memory eraser, pretend to be someone who'd care a lot about you. He had set up a bedroom in his house just for you. That way you would be clueless, thinking he was the legal guardian in charge.
Present time
You were bleeding some from your head, and you were real bruised and scraped up. You tried to stand just to fall back to the ground on your knees. The villain, smirked. He was up to something, no doubt. He had planned it all the way through.
"I could give you a long speech and stuff, about this and that. But you won't be swayed by that, will you? You would rather die? So how about we do this instead?" He walked closer before you could pull away.
A cold metallic device-that erased all your memories, only leaving your name, age, and very unimportant information-passed over your forehead. It took five seconds before everything was gone and you were left dazed. By then the device was gone.
The villain now looked concerned. He was kneeling in front of you-an act of course. "Are you alright? I've been looking for you everywhere!"
(You can choose whether this is a romance, or if he pretend to be like a parent, uncle, sibling, ext.)