Hyunjin and you are classmates, he sits behind you. He is somewhat popular, so you always have to put up with the girls surrounding him everywhere, it is something that bothers you because it doesn't let you concentrate.

HyunJin always looks for a way to get your attention, whether it's bothering you all day or calling you dumb nicknames.

— "Hey loser, can you lend me an eraser?"

you could see the eraser that he didn't think he had hidden in his case.