War Of Underworld — Sword Art Online: Alicization -

Establishes Kirito, Asuna, and the core cast.

Canon film that introduces technology and characters relevant to Alicization . Sword Art Online: Alicization - War of Underworld

Episodes 1–24. Ends with the battle against Administrator. Establishes Kirito, Asuna, and the core cast

To fully understand War of Underworld , you should follow this sequence: Sword Art Online: Alicization - War of Underworld

Episodes 25–47 (often split into Part 1 and Part 2). Plot Arcs & Synopsis