On the official page for the animated franchise from Sword art online 6th volume Blu-ray / DVD compilation Anime covers revealed Sword Art Online: Alicization - War of the Underworld. The launch is scheduled for October 14th and will contain episodes 16-18.
The series premiered in Japan on July 11th. Sword Art Online: Alicization is the adaptation of the "Alicization Arc" from Reki Kawahara's light series of novels, which will air a total of four arcs. "War of Underworld" aired, the first 12 airing in the first part, which was released in October 2019.
Reki Kawahara began publishing the novels independently in 2002 and subsequently published them through the publisher Kadokawa in April 2009 with 23 volumes. The franchise is one of Japan's most successful light novel series, considered by fans as the light novel of the decade.
Sword Art Online: Alicization - War of Underworld Synopsis
Kirito suddenly wakes up in a huge and fantastic forest full of towering trees. On his search for clues that will tell him where he is, he comes across a boy who seems to know him. It seems like a simple NPC, but its conversation and depth show that it could be human. As they search for the boy's parents together, a memory echoes in his head, a memory of his own childhood, with this boy and another girl who also has his golden hair and a name he should never forget : Alice.
Source: official page
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