Wait?! What's going on?? He is not with the white haired guy? All what happened in the first story and here is fake? 
Rei♤♡◇♧
Comment by Yuroi_x on Back to School: All Grown Up - Chapter 9
2 Replies
@Yuroi_x author said at the top that "this is a side story unrelated to the ending of the main story. Its a parallel universe spin off"
@Yuroi_x The author wrote on her social networks that since readers did not like the ending with Kyujin (many hate the blond class president for manipulating and raping Chiwoo), she drew an alternative version with Jihyun (many people like the black-haired guy). Both endings have a right to exist.