Is that something you'd be interested in seeing?
The short answer to your question is: "maybe."
The option is on the table. You've likely noticed I've avoided calling it a "monster girl" game and just calling it a "monster" game because that's something under consideration. The plan is to decide which characters will be dates, and in which order, via popularity votes. I can say for sure that some characters in both those categories will get added to the character polls at some point, but they may or may not win the votes.
There are 100% going to be male monsters and NB characters as NPCs and side characters even if they don't win the votes for becoming dateable.
Likewise, the option to be female or NB is also on the table, but it's both cost and labor-intensive to have gender options on every chapter, (Requires alternate CGs on several scenes) so to what extent we prioritize those options will also be based on popularity polls. That said, playing as a female and dating a monster boy; or dating an androgynous, genderless, or hermaphroditic monster/alien/robot; or having f/f, m/m whatever/whatever pairings are all scenarios I can see cropping up in the future.
Including those options might alienate some fans who would prefer we focus only on monster-girls; but there are plenty of other monster girl games that do so, so I'm personally interested in finding out how much interest there would be for expanding on the range of available content.