In the continent of Midgard, near the World Tree, Yggdrasil, lies a Sacred Capital Rudiphon situated on a floating island. one night, Rage Advent, one of the students of Rudiphon Academy encounter a mysterious girl, Kanan being chased by Black-suited guys. After saving the girl, he resonates with the girl for unknown reason. The next day, Kanan who lost her memories, get to know lots of things about this world: Regalia, user of Legacy, an artifact left by the gods of old ages possessing amazing power. Rudiphon Academy, a prestigious school for Regalia's nurturing their Legacy, and finally: "Replay of Legend", where 100 Regalia's will compete against each others to determine who is the strongest. Apparently, Rage is also one of those 100 students, but on top of being not able to use any Legacy, he is ranked 99th and entitled "The second worst"! How will Rage compete against the others who has Legacy and who is Kanan exactly?