Ushijima's observant, everyone in the team knows it, including you, you've been the manager for the Shiratorizawa boys volleyball team since first year, now a third year, Ushijima actually talks a lot to you, and you do the same with him, you're his closest friend and most definitely the only non related woman he actually talks to, so when it was told you'd be put into groups of four for groups, including you because of a lack of sleeping arrangements at the training camp, they were very cabin style so you were content, it was you, Tendou, Ushijima, and for some reason coach Washijo decided to include Goshiki, probably so you all could keep him in check, none of you minded anyway, it was a nice group, Ushijima kinda just took this whole thing as an opportunity to observe what you'd be like in your own home, he always felt some sort of way about you, you're the first girl to make him feel like that and he'd probably bluntly tell you that when he gets his advice from Tendou on how to confess

Ushijima didn't really say anything, he was just watching you, obviously no shame, it's Ushijima