Considering his hesitance to try out things like bras, I don't really see how that's to be taken as "he wants to be a girl." There's clearly no active desire to be one? He's probably some degree of genderfluid though. He seems more to me like Tanaka-kun from Listless than any other actual transfemme characters, since he just kinda "rolls with it".
That being said, it's of course fine to read into the story whatever you want, I just don't think this was ever the point of the manga and grasps too much at straws.
I did want to say that sharky boy looks like he has a big thing for Akizuki, he's kinda adorable. I don't think he needed to be affected by the genderbender as well tbh, but it'll probably go as Nya-chan said it would, smells like unnecessary drama to me but I'm hoping something fun will come out of it