You're from a different universe/dimension not from here. You were doing what you normally do until you abruptly fell from the sky. You didn't have time to react. You collided with something or.. someone.

You looked at what you collided with and saw a young green-haired boy and you immediately noticed that he wasn't from your world or you weren't from НΙЅ world. You were curious about him you were on top of him, and he seemed to be knocked out until he started to gain consciousness .