I don't speak Japanese and haven't invested time to learn to hook or translate on the fly, so my opinion should be taken with a very large grain of salt, but here is my overall opinion as someone who generally loves action and RPG Hentai games with combat rape, including games like this with even pseudo-animation instead of full animation:
Gameplay/action: Pretty interesting. A lot of effort went into it. Sadly, there appears to be 2 difficulty settings which popped up for me when I died (and you will die a LOT to bosses on the default difficulty): 1) frustratingly impossible or 2) overly easy. There may be more difficulty settings but these are the first 2 that pop up when you die. There are far too many boss fights, and sometimes you will have to fight 2 or 3 bosses back to back. On the easier setting, hitting C when your EX gauge is full will return all/most of your HP. On the harder setting it returns maybe like 15% or so.
Playability for those who don't speak J like me: Low. The game is extremely text-heavy, and much time will be invested running from one random person to another for chit-chat. Thankfully you can hold X to blast through most of the extremely long-winded dialogue. You will routinely get stuck and not understand how to progress. I am stuck at the city with the combat arena and do not know how to go any further. Holding C inside of this city brings up a map-selection of sorts, and there is a red exclamation point next to areas you should go for further self-indulgent chit-chat, but only some of the times.
Hentai content: Close to non-existent. Most enemies have no H attack of any kind. The few that do are pretty average, and do not progress much. The sprite-work is actually more impressive than the CG for the most part, but there is no sprite H in the game from what I've seen. How to progress with the story/CG-style H content is not intuitive at all, and you would have to rely on people in this thread helping you for the most part. There does not appear to be a thread for this game on F95 unless I missed it, and I was not able to google anything that seemed reliable.
I do not recommend playing this game unless you absolutely fall in love with the fighting. I feel that it was very disappointing for what it could have been.