M0E53

Ahahaha the guy who oppesed the relationship of them was the main couple mc, he and the main ml meet overseas (i am not sure but i guess they knew each other from college or even from highschool) and then they shared room when they are in another country and passed time and they even did the deed etc. And then they were back in their country in the same college but different departments they had a plot for themselves mainly mc is a pure one person only guy whereas ml is a open relationship kinda guy. And this hurt the mc and then they got together at the end again. This second couple uke is mc’s department senpai and also was his roommate at dorms, kinda like big brother. And eden (the guy likes the senpai) was a music major also a friend of main couple ml. He returned and they (eden and senpai) also became roommates in the main story for a while and they were clashing characters. But their story turned into an enemies to lovers one, eden had his hair dyed blonde when he returned from overseas but then he had character development thus he returned his original hair color. And also he was like heartbroken with his major, violin. i think he also returned to that and then he realized he actually likes the senpai :)

aaaa thank you so much!!!