^ It's basically a mobile game where you play as a monarch who initially had a noble betray them before finding out it was all instigated by a neighboring country. Things start escalating from there as they uncover that the chaos happening around the world is due to a specific country in the far east called Gallus that wants to take over the world. It's not as cliche as it sounds because the reason why that country is doing that is trying to unite humanity, even if it's through tyrannical means, in order to withstand a calamity that's coming.
Honestly the story isn't amazing or anything, but it's very charming imo. It's super idealistic, but I think the heart of the story is the right place so I enjoy it. The actual gameplay is turn-based RPG and you can unlock all the characters without any gacha mechanics. There's units you can buy with straight up cash though, but you don't need those at all since there's really good heroes you can get through "contracts." Basically just login everyday for the amount of time the contract lasts and you'll get the hero.
There's guilds with raid content, a PvP arena, and some other stuff. It's P2W though, at least with the PvP content. The rest of the content you can clear without spending any money, and the arena awards are basically just for getting the currency needed to roll the weapon gacha. You get a lot of that currency just playing though and don't need to get too far in the arena to get a good source of said currency.
It's a good idle game to play, you don't need to be heavily invested and can just play casually.