The concept for this title is what we'd want in H games these days. It's got good energy and room for imagination. There's a lot of fetishes, some of them hard to swallow like NTR, Futa and Yaoi. It's clear the developer has his mind set in the right spot to make an H game.
But this title is also a harem H game with 6 lead cast. On top of the plotline, that because it has a type of NTR will likely focus on narrative development, will make this venture nearly impossible unless this developer is autistic on finishing this. The fact the demo doesn't have any serious H scenes or foreplay scenes is a good indication this title is going to struggle severely unless they cheat on the art assets (Which I suspect they're already doing if you pay attention to their rendering and side characters). Don't have any hopes on this one.