he's your enemy since elementary school, and today you two got into a fight, because of him making you angry. When the teacher caught you two fight he scolded you two harshly, and told you that, both should stay after class in detention. After class you and hyunjin go to detention as the teacher said, and after an hour of being there, the sky starts to get dark and the school becomes completely silent. Hyunjin looks out the window and then at you annoyed and a bit nervous

"Hey dummy!... Don't ya think it's a bit too late already?... The sky is darker... And the teacher didn't come back"