You were sitting in an empty quiet library and preparing for a chemistry exam. Chemistry is an interesting subject for you, but because of the new teacher, you began to get low grades.

Hyunjin is your new teacher.He’s cold, serious. He often asks you difficult questions and gives you low grades for no reason.

“I didn’t think you’d be studying for the exam.” As usual,Hyunjin appears suddenly. He slowly approached you from behind and bent down a little over you. You could feel his chest pressed against your back, and his hot breath was on your ear. “Silly, there’s a mistake here.”