I am replying to fluentinmanganese but not gonna reply them since I don't want to necropost
Spoilers
TLDR: Kaname learns from Utsumi in chapter 14 and tells Tsubaki what he actually feels while also defending his friends.
While this would usually be out of character for Kaname ( main protag), Utsumi pretty much did exactly this in chapter 14, and he was also shown to be conflict avoidant in that chapter, suppressing the discomfort he felt with the things Koyama said.
In his case, it was in response to a well meaning but painfully frustrating ally friend, but in the end he spoke about what was truly on his mind about his own identity in an explosion of anger while making clear to not hurt his friends, which Kaname was there to see.
Even annonymous' response to kaname at the start of this chapter is basically telling him to fight back and let his anger not remain silent " If you live without getting mad, at the very least you could end up invisible".
And so like what Utsumi does, Kaname spills the beans about what he's actually feeling and defends his friends at the same time.
Tho I do agree with moonlight00, it would've been nice to see Tsubaki retaliate since it's a little hard to believe he wouldn't be caught up in his frustration around repressing his sexuality and hit back at Kaname even harder, tho that might drag out the story abit much so I can see why it wasn't explored