Yk what i realize is they can understand each other even through eyes and they have that tension that none ship other than beomgyu and yeonjun have its not just fake jealousy that fans just make up honestly. Yeonjun is that type person who is overprotective but tries to hide it as much as he can hes not too obvious but we can just notice how he acts around when gyu isnt paying attention to him. His eyes are always layed on beomgyu and the look in his eyes for beomgyu is real and his gaze for beomgyu is just insanely smth that i cant describe.Even tho this ship is not popular as other ships in txt this is the realest one so far. People just cant feel the difference between them like yeonbin is the most popular ship but i wouldn't agree to the theory where it says they love each more than anyone in txt. example soobin like kai the most he always praises and he is super overprotective of him they have too many moments that fans dont see even the members themselves once mentioned kai being soobin's fav. When it comes to gyu and yeonjun they are kinda trying to hide that tension between them if im experinced enough to understand people's feelings they are kinda awkward with each other at the same time as they can not love anyone rather than each other so much...
Beomjun always has this certain tension going on between them. I don't know how to explain it but they seems so genuine with each other and you can just see how much they effect eachother. They really care for each
Perhaps u can go back to predebut till rookie era? (Till before blue hour era) Beomgyu and yeonjun literally glued to each other and jjunie babying gyu so much like he is his son lol 😂