This might annoy people but I think they need this tbh, if they are actually going to keep the relationship as it is they should asume and deal with the possibility that other person could grow closer to the other.
I think it's more about Chokki coming to her senses already. She obviously likes Shun but she acts like she's convincing herself that she doesn't, or that at the very least seeing him happy is enough for her.
My hope is that this mini arc breaks that for her and she realizes just how much she actually loves him.
Either that, or this misunderstanding is going to reinforce her feelings of "I guess I am alright as long as he's happy and he obviously doesn't like me like that"
Also, I know we are like 5 volumes deep, but am I the only one who can't see Chokki with the purpleish hair like she has in the cover arts? In my head her hair is a brownish orange, idk why.