It's... a decent game, I think. The game is a bit slow, but it doesn't feel entirely detrimental. The running here is about the same speed as normal movement in other games, but doesn't have a stamina system for whatever reason, so you end up just running most of the time. Spacing is important here, and enemies tend to be designed to around this limited mobility, as they're normally slow but are pretty much unflinching.
I'm reminded of classic horror survival games, and it does feel like the game is a 2D version of a traditional resident evil game. Move, stop, aim, shoot, then move again, and that's pretty much the combat loop. It's very satisfying in spite of how limited it is. But, there are a few issues:
Enemy and area designs are a bit uninspired. Don't get me wrong, it all looks good — amazing even, but the gameplay side of things tend to lag behind the presentation. Rooms are typically just straight lines, and the enemy placement feels very static. One enemy type per room, and they're spaced out just far enough that you rarely have to deal with more than one obstacle at the time. That, combined with simplistic enemy behaviors can make things a bit too predictable.
The game is better with its bosses; They're a bit more tightly designed and encourage movement, often forcing you to move from one corner of the screen to another to dodge attacks, which rarely happens in normal gameplay. I think the final boss, while a bit annoying, could've been a step in the right direction; Being surrounded at all sides by a legion of tiny mobs while having to ration your mana was pretty fun. Too bad it happens a little too late into the game.
As for the H-content, I'd say they're good. Animations are decent, and there's more accessible stuff for people who aren't into guro. The village events were also well done. I'm a big fan of the game over scenarios too, but apart from the goblin section, I feel like the first game did most of them better. Personally, I would've preferred to have pixel art for the character portraits; The art here is too clean and lacks the "griminess" of Rabiane's portraits.
Overall, it's a decent sequel; Improves on a lot of things, but some of the quirks are still there.