This is the game for you if you enjoy:
- Anime
- video games
- clever references to anime and video games
- characters breaking the 4th wall constantly
- a story that's mostly about interaction between the characters in a comedic way
- turn based JRPGs
- small amounts of grinding here and there
- huge amounts grinding to get absolutely everything (but you don't have to if you just want to finish the game)
- games developed around the idea of "fun" instead of "making money"

There's some fan service here and there, but overall it never felt that much out of place. If you've seen a couple anime, with their one-off hot spring episodes and so on, you know what to expect.
Picked this up during the Summer Sale and have gotten 90+ hours out of it, friend of mine finished it with all achievements in 60 hours. So it really is as long and grindy as you want it to be (gotta get all the costumes).

There's also some extra DLC that's free, but you have to install it kinda manually. Mostly some potions etc. to make early game a bit easier. Nothing really game-breaking. But I do applaud the decision to make it optional for players who don't want any help.

All in all: Great game, definitely get it, if it goes on sale again, you wont regret it!