The Osmanthus Knight
Though riddled with wounds, Kirito manages to activate his Perfect Weapon Control art. Continuing on their way to the top floor of the Central Cathedral, Kirito and Eugeo find themselves standing before a strange-looking floating platform.
Aired 27/01/2019EP 16 - The Osmanthus Knight
Sword Art Online: Alicization
Kirito awakens in a vast, fantastical forest filled with towering trees. In his search for clues to the truth of his surroundings, he encounters a young boy who seems to know him. He ought to be a simple NPC, but the depth of his emotions seem no different than a human. As they search for the boy's parents, Kirito finds a peculiar memory returning to him. A memory from his own childhood, of this boy and a girl, too, with golden hair, and a name he should have never forgotten - Alice.
(Source: Yen Press)
Note: The first episode aired with a runtime of ~48 minutes as opposed to the standard 24 minute long episode.