Gameplay
Honestly a solid metroidvania game, i got around 2.5 hours of gameplay out of it. Can get difficult at places but you can make it through if you persevere. The movement and combat feel fluid, the character feels like they're at the perfect weight. No XP grind is required, you can just keep going to newly unlocked areas. The skills you can unlock/find are pretty fun, although newer skills very often outclass older ones giving you no incentive to ever use your older ones (the final two skills are exceptions).
Graphics/H-Content
The art style is beautiful, the animation is smooth and there's a gallery that fully unlocks when you finish the game, allowing you to view game-over and in-combat h scenes. This is really more of a metroidvania with h scenes on the side rather than a h game which is a metroidvania on the side. Warning, a lot of the h content is monster-on-female content.
Conclusion/TL;DR
If you want to play a solid metroidvania game with some h content, this will be perfect for you. The difficulty is just right, gameplay is smooth, nothing feels particularly unfair and the bosses are fun and challenging. With a beautiful art style and good level design, this is just a really solid game with no glaring flaws.