seongwooo and hyeongsub have become so close lately maybe because they are in one group for now. but somehow thier closness make someone feel uncomfortable and sad, and that someone is kang daniel aka seongwoo's one and only legal boyfriend. daniel doesn't want to let older to know that he's jealous, so he just keep all those feelings for himself, and it stressed him so much, he can't even focus on practicing because of it. 

will daniel continue to stress himself because of those feelings or he will let those out??