Dude with the glasses (forgot his name) is the uke's (from the main couple) doctor while dojun is uke's older brother. I hope it helped
The glasses guy is the doctor of the omega in the main pair, and the other guy is the omega’s brother ‘ w ‘
They're doyun's (the mc) older brother and doctor i think they met when the doctor was looking for an apartment and dojun hepled him at first
Omg thank you so much to be honest i dont really pay much attention to the other characters
So im still trying to remember who this two are but i cant seem to remember so if theres someone who knows i would love it if you could tell me thank you have a nice day