It's literally just pinball with heavy fanservice. I can't even recommend it to fans of the series, because there's barely any content to dig into. The story is pretty much non-existent and completely nonsensical, with the same basic set-up being rehashed several times so that you can play through it with each of the 5 girls.

The gameplay itself is fine for a few minutes at a time, I suppose. It's just pinball. The game's gimmicks don't really make it anymore interesting and there are much better pinball games out there. Skip it.