TL;DR: the game is still at a buggy early build, but has a promising story with some interesting gameplay decisions, which may or may not turn out really well. Seems more exciting than the bunnies RPG from the same dev.
Spoilers ahead!
So far this game seems to have way more gameplay potential than the bunnies RPG one. The artstyle remains good. From the comments I see that the open-ness of Lucille about all the ntr stuff is a controversial topic, I trust the dev has the plot and gameplay mechanics to support this, but so far it does seem like there's little tension. I presume the plot will be more focused on the protagonist dealing with it and reflecting on it.
I really enjoyed the metroidvania aspect, especially the idea that it would require other NPCs to join the party and therefore lay their eyes on Lucille. However, the only NPC that is available to travel with so far (at least from what I discovered, I may have missed something) for some reason didn't take any initiative except for one cutscene that repeats each time when unlocking holy locks. I don't know if it was Lucille's affection that was too high or was it a bug of sorts. Maybe adding some gauges that would make it clearer about the state of Lucille's relationships could help with that, numbers aren't too helpful because it's unclear what they mean exactly. Maybe another option would be asking Lucille what she thinks of others or something like that.
Completing the cultist-demon area became pretty repetitive at some point. There were some super nice scenes, but there were a lot of cultists who kept doing very similar things with very similar CGs, and I believe two of them were almost or completely identical, maybe it was a bug or something.
In any case, the story seems pretty interesting so far and has a lot of potential. Looking forward to see future updates.