(For version 1.5.0) Looks like one of the guys who posted fan art on Eternum's Discord server now made his own handdrawn AVN! They grow up so fast (wipes tear).
This is more of a classic VN with backgrounds and variable animated character sprites. It looks really good! Though there isn't much of a main story, save for some overall world building. You could say it's a dating sim, but without any notable interactivity. There aren't any story hooks, but still, the dialogue is well written.
The setting is monster girls living alongside humans in a current-day city. Most interactions are flirty and you get about five lewd scenes per hour of playtime. Reasonable, given the setting, but way too frequent for my taste. Though since there's barely any main story, there isn't much else that could fill the time instead. The lewd scenes are really well made though, both their writing and animations are great.
Overall it's high-quality and hot, but it won't really hook you. It doesn't quite stand out from the rest, sadly.
Overall: 7/10
Visuals, Animations & Lewd Content: 9/10
Characters: 7/10
Story & Audio: 5/10