If I'm being honest, I wish the author did a just a LITTLE bit more to distinguish Ibuki as a girl (and I understand she's supposed to be boyish and cool in appearance and manner). But, to me, it really feels like the author just drew a tall high school boy and said "this is a girl." She's TOO boyish looking for me to believe she's actually a girl.
But whatever. It's just a nitpick.
Thanks for the translation.
That's expected with highly stylized artworks in certain mangas that end up being very androgynous. That's why it's so easy to gender-bend and cross-dress manga characters...
Therefore it makes sense to rely on the author's information to understand what the characters are if gendered characteristics don't follow social conversion or there isn't the cop out of drawing big breasts or highly detailed eyes on women, for example.
Many manga authors readily play with this, and in my opinion, it's perfectly okay. Take a look at this example from Uzaki-chan Wants to Hang Out:
https://mangadex.org/chapter/d146c81d-8815-4cfc-9649-2b976a9f51d2/7
Mind you that this comes from Take, an author that exaggerates sexual characteristics on his characters a lot to convey gender.
On the other hand, this author is using their own artstyle to tell an unique story and mess with the expectation of the readers, and that's pretty refreshing.