homeroom teacher: chan has been swearing a lot in this class these days. i think you should talk to him. not sure where he's learning such words.
jeonghan: i shall look into it. thank you for bringing it to my attention.
(at home)
jeonghan: chan, we need to talk. your teacher told me that you've been swearing a lot in class.
chan: so...?
jeonghan: who the fuck taught you to swear, you little piece of shit?
seungcheol: what?!!!? chan swears? what the fuck?!!?!?!
jeonghan: it's all your fault.
seungcheol: my fault?!?? how the fuck is it my fault???
jeonghan: you keep swearing all the fucking time.
seungcheol: i don't. now shut the fuck up
jeonghan: no you shut the fuck up