Hey yooooo this manga has an actually decent portrayal of a trans character??? What a refreshing discovery! As Meikakuna above me mentioned, I also can't be sure if its just a transnational choice but I'm inclined to believe its not. The way the character speaks about himself is very definitive of his gender, not leaving much room for "accidental" misgendering - which the other characters quickly pick up on.
Just as a warning though, there is a physical outing of the trans character (my only real gripe with the story), which sucks, but the character seems to take it alright and doesn't get too upset about it. Not that it really makes it much better.
Other than that though this manga is super sweet and really enjoyable!