A nice game.
Actually, I was fooled by the fact it was an acerola game, because they belong to two dinstinct groups, the RPG series and the NTR series, but this is neither. This is a dungeon-crawler. And a nice one, actually.
It's worth saying it's intuitive even without knowing magic runes (beside the "egg" part, there I wondered for a couple days...) and the images are good, acerola-level of quality

Even if this is their first tentative at animated scenes (at least so acerola claimed... unless googletranslate is cheating me), those parts are really good. Actually, I would have liked to have similar animations for the "battles" (you know what I mean) in the RPG series.
That said, unfortunately the game is short (not counting the infinity-mode), I would have liked something more.
But maybe what wasn't present in the game is the interaction with the surrounding "world" (which -admittedly- make up the most of the time I spend in the other acerola games, just bouncing from one side of the city to the other is fun). Nonetheless, the cutscenes seems to hint a substantial plot (that I didn't understood 'cause it's in jap) so it's maybe just my impression.
What is missing is the "corruption", present in all the other games and here only in a fashion, but being a dungeon-crawler and not an RPG maybe it's not really an issue.
But the dungeon are fun and not always easy, the animation smooth, so I'm fine with it.
Just 3 and something Gb seems a bit too much, but I think I'll blame the Wolf engine for that...