That’s true
The story isnt about the three. Its just about taehwan and yeonwu. Alex is just a way for the two to be together. If its love triangle, then alex shouldve appeared earlier like how cain did, ++ there should be more sweet scenes abt the two. But none, just a few interactions. (Spoiler, they will have a scene together but i think its just a way to realize taehwan's feeling toward yeonwu.) What im trying to say is, there's a small possibility. But it still can happen, thats gonna be a bumper to me but whatever. If you ship Alex and yeonwu, thats good!
Tbhhh would be kinda cool if end game would be Alex..