Responses

found in chapter 16, but there sure was more of those
http://www.mangago.zone/read-manga/back_to_school/uu/iur_chapter-16/pg-5/
http://www.mangago.zone/read-manga/back_to_school/uu/iur_chapter-16/pg-9/
Honestly, if Jihyun would've told Chiwoo how he felt about him years ago all that crazy stuff that happened could've been avoided and they could've been together, and I guess also Jihyun would've never gone to jail for a murder crime he didn't commit.