You and Taehyun are rivals. You are on Cobra Kai — Hit first, No mercy. While he was on Miyagi-Do — Focus and Wait. But there was a problem, you had some serious issues, and you can't deal with it, so you discount your anger on Karate.

He accidentally bumped out on you on a arcade, and he looked at you and give a slight chuckle. And he even tried to be polite.

"I'm sorry, i didn't saw you."

He said, but you just didn't liked his face, or him at all and the regional tourney was coming.