Neither atm.
Right now Rinko is really confused on her gender identity. Like, it boils down to what her mother said back then: she is chasing down a sense of normality. She feels like people will think her body is disgusting because she changed sexes all of a sudden and she doesn't want people to know because of that fear.
Honestly from what I've seen she doesn't seem to mind about being a guy that much? I feel like her gender dysphoria would've been a lot worse if she weren't somewhat accepting of the idea. I think most of her own problem is how she views herself in society, especially concerning the boy she likes.
That's why her mother had to ask the brutal questions on whether her request for a sex change was out of her own self-identity, or was it really just chasing down this sense of being normal again, even if she could no longer return to being 100% a woman again, just a trans woman (this is not being transphobic, this is a question of biological semantics, you can't expect all the organs to be fully functional unless their society is THAT advanced).
The question the ending scene provides is whether or not the friend she's been hiding it from is able to accept the fact that her sex has changed. If her friend does accept her, then the next she has to do now is figure out how she truly wants to live as a person. Does she want to fully embrace being a man, or does she want to be a woman again, albeit trans this time?
Maybe she realizes that she is fine being a guy and Yuuki is also fine with her being a guy and they have gay sex. Maybe she realizes that she does want to be a girl anyway but she ends up liking Mao and they have lesbian sex instead. Maybe she ends up being in a straight relationship. Possibilities are endless, so now she just has to address the problem of what she truly wants and not out of wanting to conform to society.