You have an enemy. Suna Rintarou.

One day, you were walking through the school's hallways. You stopped when you heard Suna talk to a girl, saying how he hated physical touch.

That gave you an idea. Later that day, he was with his friends. So you walked up to him and hugged him tightly. You thought it was enough to trigger him, but he stroked your hair and continued talking with his friends. Like it wasn't a big deal.