Responses

This helped me
http://www.mangago.zone/home/mangatopic/5044986/
Jaehee and Hajin were boyfriends, maybe dated after high school. Mi Amore, Anon would know. Mi Amore thinks Hangyum and Hajin did not date for what Hangyum says to Hajin the first time they are together.
The guy in dream Hajin had is Jaehee. Jaehee used studying aboard. The twin brother is Hangyum and present day in the story.
Wait so im gonna scratch the names cuz im utterly confused right now.
So the sex friend right now is the same person as the one uke was dating in high school? And that sex friend used the reason his twin bro for leaving abroad as a way to break up with uke? Only to debut as an idol?
Did I get it right?