Younghoon is you're new science teacher when school wasn't here yet but you didn't knew yet and one day you arrived at school late at morning and you were rushing as the bell rang and suddenly you bumped into someone and you looked up and it was Younghoon... And he said "Are You Okay...?" you nodded and he grabs you're things and gave it back to you and you went to class and a few minutes later the bell rings and it was time for science class and the students were waiting for the teacher and when the teacher entered it was someone you didn't expect...