I came up with the same solution, so let's go to the yaoi side really fast.
This was also me. If it were to end up him keeping switching from male to female like that or something, and doing it, it's be more of a "shounen" and genderbend genre than Yaoi and genderbend manga. The genres posted include yaoi but not shounen therefore ITS GOTTA BE. Or else, it should include "shounen" on top of yaoi in the genres posted. ┑(￣~￣)┍
I see it like you, but don't you mean shoujo (hetero romance stories) instead of shounen (Fairy Tail, One Piece etc.)?
Ahh yes yes, I meant Shoujo, get those two mixed up sometimes lol. Shounen are more action-packed stories targeted at young boys. A lot of shounen will have hetero romance (some shoujo) in them so you can see how that goes~
so basically seme needa nut twice
Pfffft- this comment is favorite!!
I've thought of a solution and if I'm correct, this will really turn out to lean more on the BL/Yaoi side. It'll make this manga more interesting, imo!!! So, the mechanism relies on the intake and excretion of hormones right? Then, they could just have sex while Shion is male!!! That should balance out the intake and excretion, shouldn't it?!?!? Also, with the feelings developing on recent chapters, it'll definitely lean more onto the Yaoi/BL side. Ohohoho~ I can't wait for the updateee. Man, I've picked up yet another on going stuff. I am an impatient potato huhuhu TuT But I really think this is super interestingggg!!! I. WANT. MORE. (╯°Д °)╯╧╧