I think Suzu is a girl but just a tomboy. I think there was a chapter where he told her she was the cutest of all the girls, and she mentioned how he didn’t like being touched by girls but was fine with her. Also I think they called her Suzu-chan (and chan is usually for girls). Regardless of gender, they are adorable
(But like don’t hard quote me on this)
Suzu-chan is indeed a girl and most definitely a tomboy. If I remember correctly, she was feeling like she was unsuited to be by the brother’s side because she didn’t feel like she was “cute enough” for him. Hence why the brother said she was the “cutest girl.”
Your comment made me reread the En and Suzu part. And you're right! Suzu is a girl, just a tomboy. Great understanding and observation!
I was so shocked reading that the little bro was in love with his male classmate.
Not against it but I did not expect romance for him but ooo! They seem so cute, hope we get to see a chapter about them when they are older