While I think that the character designs are cool and well-drawn, I can't say the same about the rest of the game. Enemies are far faster than most units can attack and come in large numbers, making it very hard to stop some of the larger or back-to-back waves the game is fond of. The initial set of units isn't enough to meet the game's demands for very long and (in my experience) I was only given about 4 free pulls from the story/beginner events and had to work for a 10x pull (which isn't that bad, but does not help progression). Also, most of the game's "difficulty" comes from throwing more enemies at you rather than real differences between enemies. All in all, in my opinion I'd say give this game a pass.
2d tower defense type with anime style, but sadly it's poorly excecuted, graphical wise it's not that appealing, especially with the UI, a cyber anime style does not suitable with the kingdom theme character designs, the ost and vfx are also very mediocore, nothing special really, the sprites size are also very small, can't even see the details of the design, give it a year or less the game will not last long.