
Yeah, I kinda thought so too based on the BL tropes, but it just bothered me that it wasn’t actually explained. Like, it could’ve also been the case that the blonde and seme were dating at the time, or were friends with benefits during college, or maybe just had a one night stand? I guess I just wanted more clarity on their relationship lmao

SOOOooo
When the hyung started realising his feelings for the lil brother (MC) may have been beyond those of family but of something more, he was still unsure of his sexuallity. Thus, the blondie suggested to try sleeping together. The hyung refused the blondie's suggestion at 1st but the blondie kind of said it doesn't matter they can just you know do it without strings attached. They are not exactly close friends too, so the hyung agreed. Unfortunately that's when the MC saw the deed. Also, it is hinted that through out their intercourse, hyung was just imagining the blondie as MC hahah MAJOR L to him sorry not sorry tbh he just dug his own grave bcause hyung finally able to confirm his actual feelings for MC (like he can have sex with him too).
Okay so this is my understanding of what took place after finishing the novel's main story. I am still reading the side story which i just purchased yesterday right now. If there's more additional info I will let you lovely peope know thank you

Hi, I did! The side story is about them living together and working through some conflicts involving the MC's father/uncle, the ML's grandfather and a rude regular customer. They even had a lil angsty moment near the end bacuse of MC and well the way it was resolved was kinda HOT. Unfortunately I am a bit sad about how short it was when it couldve been more. Maybe it's just me but I was hoping for a cute date, holiday trip even or whatever plenty lovely things they should be enjoying as a couple. The best part is probably MC's friendship with the guy who likes to invite him for a drink at the front desk sorry I forgot his name but hey he's a very nice friend to have indeed. MC's biggest problem is actually his tendency to keep everything to himself and failing to be honest to the ML but over time he somehow becomes more free in expressing his thoughts plus feelings which is a nice improvement to see.

Oh Gosh I forgot about him completely so I went back to scroll the side story but couldn't find any lead sorry but I believe nothing significant happened with him except for the fact that ML kinda blocked him and told his friend to stop entertaining this jaehee dude trying to reach out to him (the ML)
ok but like why was he with the blonde guy if he actually liked the mc in the first place?