This is a reply to @_Rachoo_ and maybe others who might be confused about the dilemma/storyline of the story. Basically, Jungkook dated Chun-hay for a bit, but Taehyung just kept getting bad vibes from her. That's why he went to check if she would cheat(if she was the right one). In the flashabck of chapter 16, you can see how that went. He told Yoongi, who got mad about this, and then, he "injured" Chun-hay. That's how she got them all in trouble by suing their company. The other members only found out on the day the two boys confessed (see chapter 17). Yeah, it isn't really the most unique and sometimes I question if Chun-hay could be that evil, but eh. Hope this makes it easier to understand!