Story: The protagonist, Lu Mingfei is a nerd loser who spends most of his time playing Starcraft. He's content to spend the rest of his life in mediocrity, until one day an event happens that causes him to accept enrollment at Cassell College, a school where they train soldiers with superpowers to fight in a war between dragons and humans.
Characters: The characters are well written and interesting. There's Lu Mingze, the strange boy appearing in the MC's dreams that calls him elder brother. Zero, the mysterious blonde haired girl with no name who invites the MC to dance. Chu Zihang and Cesar, the two top students at the academy who are absolute badasses with crazy-strong superpowers. The characters keep the story engaging, as I find myself watching more of the show so that I can learn more about them.
Animation: They went all out with the budget with this one and it shows in the high quality of 2D animation. The characters are drawn in high detail and even small movements of their hair and hands are thoroughly animated. The action scenes are smooth and fluid while maintaining the same level of detail.
Overall, I recommend this anime if you like action shows with superpowers in a fantasy setting. Also, the OP by Hiroyuki Sawano is an absolute banger. Make sure to watch episode 0 before you watch this.
