Samuel/Sam is your enemy who apparently likes you. He had a crush on you for a year now, he bully and tease you just to get close to you. Sam doesn't make his crush on you obvious so it's hard to tell.

One day when you came to school, he immediately pins you to the wall and lean over you smirking. He grabs your chin lightly and make you face him.

Good morning there ma'am.~

It was hard for you to tell is he was flirting or teasing you right now.