You learn how to deal with negative stuff by yourself but if your sister is dealing with it. You would not even take accountability of what you've done and be by her side without messing anything? Definitely a child....
Jaekyung you already know that it wasn't Dan who is at fault, you can't even apologize? He really needs to grovel or atleast cry a bucket of tears coz he's a POS. No amount of back story will save him from being called as such because he is (︶︿︶)=凸
You learn how to deal with negative stuff by yourself but if your sister is dealing with it. You would not even take accountability of what you've done and be by her side without messing anything? Definitely a child....