Well... This was an ok time-waster, I guess. It's more of an auto-chess game with hentai tacked on than a proper hentai-game, but it's not the worst idea I've seen.
That said, the RNG for unit acquisition is absolutely horrible and the skills you can pick to make your runs easier aren't particularly interesting for the most part. It doesn't help that the various units in the various rarities tend to vary way too much in terms of how useful they can be.
Like. The knight-boy you start with has surprising staying power, as at 3-stars he's a decent tank even in the late-game, especially if you make a 5-knight team so he benefits from fuck-tons of shield and some damage reduction... And you kind of DO want to make a heavy knight team, because Knights also have Dahl, which is very useful, and Anno, who is simply busted to the point where only Annabel equals her.
Unfortunately, the "Archer" class doesn't have a max rarity unit, and most of their units are pretty meh anyway. On top of that, the warrior max-rarity unit, Sana, is complete garbage, so building up a warrior team with a demi-human focus doesn't work out very well compared to the Human+Elf knight focus combo with a couple of mages, including Annabel for the freeze.
Used this team in Endless mode and reached Day79 without any particularly intelligent use of tactics.
As for the True ending...
The fact that you get a 45% increase to enemy HP and Attack, when the enemy already spams damage sponges in the last 10 days, is torture. It was pure dumb luck that allowed me to get it as quickly as I did. Not being able to use prostitution and getting increased Lust, which means more gold spent on prayers, was already bad enough...
Thank fuck for Anno and her ludicrous AoE. If I hadn't lucked into getting a 2-star version of her and an Annabel for the freeze, there's no way I'd have made it so fast. I don't want to know how many repeats I'd have needed to get all the stars to align properly....