STORY
You are a guy.
You get thrown into another world.
Now you're not a guy anymore.
Apparently, you reincarnated into the Succubus Queen, and now must find a way to return things the way they are.
I'll be honest, for someone who is actually interested in the premise (guy turns into girl, and experience things they wouldn't be able to as a guy otherwise), the story is quite shallow.
GAMEPLAY
You have 3 characters, and while anyone can learn any skill, each one have stats that are tailored for a specific role. In this game, the main character is more suited to Physical DPS, the second party member is suited for Magical DPS and the third one has more speed with support skills.
As for the dungeon crawling itself, it's pretty standard. If you've played a dungeon crawler, you'll see many familiar aspects of the genre.
The problem here is the gameplay.
There are no random encounters, instead enemies are present on the field and you must directly interact with them to initiate combat. The neat thing is you can see their type (Physical, Magical, or Balanced) and their elemental affinity, meaning you can prepare for each fight that gives you the most advantage.
Said preparation is done through customizing your characters' skills and equipment. Combinations of skills and equipment can be saved into a set, and you can simply change to that set the next time you need an advantage against a particular enemy.
Some may find the dungeon crawling repetitive, as there are very little events that happens while you are exploring a dungeon, meaning it's nothing more than battle after battle.
ART
Fine, in my eyes. All of playable girls are on the cute or moe side, with one girl having the most, one girl having the least, and the main character somewhere in between. At first glance you'd think they're teenagers, not a group of ageless succubus.
HENTAI
Remember the dungeon crawling?
Erotic events only seem to happen after you beat the boss and certain story moments. There are no hub, town, or city to explore. All you get is a main menu where you can prepare before delving into yet another dungeon.
I have to say, personally I'm only interested in the main character and none of the other girls, not because the scenes are bad, but because I'm the kind of person who holds the belief that being the main character she should get get more focus.
TLDR
Events are far in between rather repetitive dungeon crawling. Unless you do like dungeon crawling by itself it can get pretty tedious and I won't blame you for thinking it's not worth it to sit through long dungeons just to see one or two scenes.
Hell, Easy difficulty only lowers the enemy's HP just by a little bit and nothing else.
(There is an item you can use to skip fights and still get the items and EXP, but it is limited and you can't use them on bosses.)
THOUGHTS
I like the premise, but I don't like the gameplay.