tbh its been a while but ill try.. seoin and yeongwoon were classmates in highschool, became friends, "messed around" apparently, and then one day yeongwoon up and left for ten years without telling seoin why. After he left seoin asked yeongwoons uncle/hyung or whatever but he didn't tell him anything about why he left(i think??) or maybe he didn't know why but i don't think he told anyone at all. then fast forward yeongwoons a bodyguard for a guy seoin is fucking, stuff happens and yeongwoon ditches his job and becomes seoins bodyguard. Seoin is jealous of yeongwoons hyung/uncle cause he knows more about yeongwoon (or some reason like that) but neither of them are in love with the uncle. Also not his actual uncle, yeongwoon met him cause his dad owed some people money, and the hyung felt bad for him or something and has been helping him out since he was a teenager.
hope that made sense cause i don't remember half the plot
Can someone pls explain the whole plot (is the brother inlove with seo in?)