What if it has a massive twist ending where everybody just becomes 1 big harem/orgy mixture. Or maybe Yuri gets a penis (full male or Futanari) and impregnates Hina. Threesome with prez and another (likely Yuri or Kyousuke) could be interesting as well.
But if the usual continues, Hina will either revert back to male, end up with Prez (male form), or Kyousuke. Yuri route is less likely, but not impossible. And there always is a chance for someone out of left field who shows up for the last few chapters. Even the possibility of no resolution and leaving things open ended isn't unthinkable either. Hell he could even be killed for some apparent reason (like secret government research experiment silencing or something) since the reasons behind this entire gender switching drug / pandemic plot point are still fairly vague.
I just hope it is not left open ended and / or poorly done.