UPDATE 1: With half anniversary coming in, it´s a good chance to look back and see how game has evolved and what we can expect. First: I went from daily login to 3 times a week to maybe like 10 days a month?. They are really struggling with player retention because the gameplay is really unfun and massively skewed towards having multiple dupes of SS. New content is literally called whale content by the community, even if day 1 f2p with luck could barely clear some of it it's generally considered to be a significant step back. No update on main story for 4 months already I think?, which also means no way to upgrade your units further except pulling the gacha for dupes. They also did a very sketchy move with the Ichiko SS release just after massively nerfing Ichiko A. TL;DR: Story is still nice, daily gameplay is bottom 10 of games I've tried, extremely boring and repetitive and even if daily missions give a decent amount of gacha currency I literally can't bother caring enough to login and do that boring and repetitive RNG grind. Still worth the install and play one day every week for updates, just not worth playing it daily or expecting a good direction on content balancing into the future, game is becoming more and more heavily p2w with each day.
This should be a premium game, honestly. No bugs or hitches at all, amazing graphics, amazing OST, 99.9% voiced. Honestly, it's really impressive the production values all around.
And then, the story, so far it's not been anything surprising, if anything it's quite a common setting, but the MC interactions with the rest of the cast and the comedy are amazing, and VA only enhance this point even further.
Ok, so, what about gameplay? A mixed bag of sorts, it's essentially a single player turn based RPG with some classes and roles, nothing really original or innovative, there is lack of variety in enemies so far as well. You can see that the gameplay is not exactly the selling point of the game, however, even if the gameplay is simple, it's not bad by any means, if you enjoy classic turn based RPG you'll find yourself at home.
If anything, the whole of the game is unfortunately dragged down by the gacha aspect. This doesn't mean the game is unplayable without whaling (so far), but you'll definitely need to play a lot better and be much better prepared without high tier units.
Honestly, compared to other mobile games I've played, it's definitely top tier.