Asuna Yuuki had never played online games until accidentally putting on the NerveGear for Sword Art Online, the world’s first VRMMORPG. She soon finds herself and other players trapped inside a game, where if a player dies in the game, they die in the real world. As she continues to live on in this world where death is always a step away, a solitary swordsman named Kirito appears before her.

In 2026, a new machine called the Augma is developed to compete against the NerveGear and its successor, the Amusphere. A next-gen wearable device, the Augma doesn't have a full-dive function like its predecessors. Instead, it uses Augmented Reality to get players into the game. It is safe, user-friendly and lets users play while they are conscious, making it an instant hit on the market. The most popular game on the system is “Ordinal Scale” an ARMMORPG developed exclusively for the Augma. Asuna and the gang have already been playing OS for a while, by the time Kirito decides to join them. They’re about to find out that Ordinal Scale isn’t all fun and games…

A special recap of the first season with an original story in which Kirito and the others decide to go on an underwater mission so that Yui can see a whale, but they face a shocking revelation... Suguha is afraid of water. So Asuna and the other girls decide to teach Suguha how to swim. Meanwhile, Kirito is meeting somebody.

Naoko Tanaka is a 26-year-old office lady (OL). Her job is typical, but her workplace has fierce fights among different cliques. Other OLs are absorbed in the daily clique fighting. One day, due to an OL at the company, Naoko Tanaka's company is targeted by OL from all over Japan.

A pioneering roboticist awakens in 2025 after decades in cryosleep. To change the past and reunite with his adopted sister, he seeks a way back to 1995.

Tanjiro Kamado, joined with Inosuke Hashibira, a boy raised by boars who wears a boar's head, and Zenitsu Agatsuma, a scared boy who reveals his true power when he sleeps, boards the Infinity Train on a new mission with the Fire Hashira, Kyojuro Rengoku, to defeat a demon who has been tormenting the people and killing the demon slayers who oppose it!

The Demon Slayer Corps are drawn into the Infinity Castle, where Tanjiro, Nezuko, and the Hashira face terrifying Upper Rank demons in a desperate fight as the final battle against Muzan Kibutsuji begins.