- Pregnant
- Loli
- Custom animations
These 3 are pretty rare in the Koikatsu games space.
You are guaranteed to attract lots of attention to your game with these.
Only downside is you can't use Patreon bc of the loli. (worth it though if you ask me)
Any extreme content is a good idea too since 95% of these games are vanilla af.
These ones are a bit extreme and you should probably just focus on the top three unless enough ppl want them.