In order to save Asuna, who has not yet returned from SAO, Kirito logs into the suspicious online game VRMMO "ALfheim Online". This next-generation flight game "ALO" has the concept of "magic", as well as action game elements that determine victory or defeat based on the player's reaction and judgment, coupled with the "flight system" that can turn into a "goblin" and fly in the sky, and high performance that is not weaker than "SAO", so many players are deeply fascinated by it. Kirito, who became the "Guard Elf" in the game, desperately headed towards the location where Asuna was imprisoned - the "World Tree" that is also the ultimate goal of all players... And Kirito finally arrived at the root of the "World Tree". But at this time, Leafa and Kirito accidentally knew each other's "secret"...
