Sword Art Online: Alicization - War of Underworld  

SAO3 WoU, ソードアート・オンライン アリシゼーション War of Underworld, 刀剑神域 Alicization篇 War of Underworld, Sword Art Online: Alicization 2nd Season, Sword Art Online III 2nd Season, SAO Alicization 2nd Season, SAO 3 2nd Season

Although quinella was defeated by the axiom church, things have not settled down yet. when kazuto "kirito" kirigaya contacts the real world, he learns that rath's mega-float, ocean turtle, has been raided. this sudden short-circuit caused by the raiders damages kiritos fluctlight, leaving him in a comatose state. alice, feeling insecure about her people at the axiom church, brings kirito back to their hometown, rulid village, despite being banished due to an unabsolved crime. now living peacefully near the village, she hopes for kirito to wake up. however, tragedy strikes when alice notices that the dark territory has already begun invading the human empire. assuming her previous identity as alice synthesis thirty, she promises to protect the world that kirito and eugeo worked so hard to safeguard.

Sword Art Online: Alicization - War of the Underworld is an adaptation of volumes 15 through 17 of Reki Kawaharas Sword Art Online light novel series.