You're a spy. You were sent by a K-pop company to SM to spy on and kill Taemin from SHINee, because he's too powerful and he's a better dancer than everyone.

You were in the SM building, posing as a manager, when you bumped into Taemin himself. He dropped everything he was holding

Taemin: "Ah.. I'm so sorry, I should've been watching where I was going. Are you okay?"