SH probably believes that NK tried to run away again to meet his teacher whose name I forgot sorry. So he's probably pissed and disappointed because he's in love with NK but thinks that NK loves his teacher
He maybe treat Nakyum like that because he afraid Nakyum will run away from him again because he thought that when is Nakyum missing. The letter maybe someone on Seungho past that make him traumatized?? Idk we still have long way to go, so many questions rn :(
Right, it could be the problem. SH think NK wanted to meet that bastard teacher.
I also don't remember his name and I won't use it even if I remember.
(●'◡'●)ﾉ
Right, remembering his name is completely unecessary ╮(￣▽￣)╭
Indeed,（￣へ￣） the story will be very long because there're many hidden plots_SH illness, his past, also that bastard teacher might do sth to SH family in future. In addition, each chapter has very few plots.
ಠ﹏ಠ
It's a relief that they didn't do anything. But I don't understand why SH treated NK like that.
Also, I have another question that "who belongs to that name mentioned in letter? " . First love of SH??? I need to re-read that chapter because I thought that was his father name #－.－).