Sword Art Online survivor Kazuto Kirigaya transports to a virtual reality called Underworld during testing of The Soul Translator. But upon returning to reality, he recalls nothing of his adventures.
Inside an unknown VR environment, Kirito spends his childhood days with his friends Eugeo and Alice. They explore a cave and get lost, ending up at the boundary of the Dark Territory.
Underworld: Kirito, Eugeo and Alice explore a cave, ending up at the boundary of the Dark Territory
The Demon Tree: Kirito awakens back in Underworld, but he does not remember how he got there
The End Mountains: Eugeo explains to Kirito the reason why Alice was taken prisoner by the Integrity Knights
Departure: Eugeo uses the sword to cut down the Demon Tree, and decides to become a swordsman
Ocean Turtle: After being poisoned by Johnny Black, Kirito is taken to a hospital
Project Alicization: Kikuoka explains to Asuna and Rinko that Kirito's brain was severely damaged in the attack
Swordcraft Academy: Kirito and Eugeo are the top trainees of the North Centoria Imperial Sword Mastery Academy
Swordsman's Pride: Kirito and Uolo duel and Kirito's sword becomes more powerful
Nobleman's Responsibilities: Humbert Zizek, second seat among the elite students, challenges Eugeo to a duel
Taboo Index: Eugeo storms Humbert's room, where he finds Ronye and Tiese tied up on a bed
Central Cathedral: Kirito and Eugeo break out of the prison using their high object control authority
The Sage of the Library: Kirito and Eugeo pass through a warp gate which takes them to a grand library