Operation Han-Gyaku-Sei Million Arthur
叛逆性ミリオンアーサー (original)
Based on Square Enix's massively multi-player online role-playing game.
Starring
Watch "Operation Han-Gyaku-Sei Million Arthur" on Amazon released in 2018. It's a fantasy and animation show, and has a rating of 6.4 out of 10 from Imdb which is usually fine for this kind of show.