Deep beneath the surface of Southern Cross Isle, a mysterious organization known as the Glittering Crux Brigade frequently gathers in their underground fortress. The group is particularly interested in "Cybodies," stone giants which can transform into massive fighting humanoids but only in a realm known as "Zero Time." By finding and shattering the seals of the island's four seal maidens, Glittering Crux hopes to break free of Zero Time and use the Cybodies anywhere they please. One night, a young man named Takuto Tsunashi washes up on the island's shore and is rescued by Sugata Shindou and his fiancée Wako Agemaki, one of the island's seal maidens. After he awakens, Takuto quickly befriends the two and proceeds to enroll at the local academy, where many of his fellow students are secretly members of Glittering Crux. However, Takuto holds a secret: when in Zero Time, he can utilize a Cybody of his own—the Tauburn. In the forthcoming battle, Takuto and the Tauburn will be the key to preventing Glittering Crux from shattering Wako's seal and realizing its nefarious ambitions.

765 Production Studio manages the unique talents of 13 professional idols as they slowly make their way to the top and become country-wide celebrities. But the girls' journey is far from just fun and games: hard work, sweat, and tears are some of the prerequisites needed to flourish in this industry—and for 765 Pro in particular, a watchful eye out for their rival, the infamous 961 Production. As the girls' fame grows, however, their time together as a family diminishes, and now the very popularity they sought is threatening to tear them apart. A difficult balance of work and bonding must be achieved, or they risk everyone going their separate ways. The personal and professional ordeals of these idols can not be conquered alone, but with each other's loving support, any obstacle or hardship can be overcome!

Due to his cheerful personality and ability to smile even through a hard day's work, Kanade Amamiya is suddenly scouted into the idol life by industry legend Haruto Mikami. He joins the agency D-4 Production where he meets fellow high schoolers Shin Oikawa, Junya Sasaki, Itsuki Katagiri, and Chizuru Sawamura, who all aspire to become idols. Inspired by their determination, Kanade embraces this new life. A perfect chance for his debut appears when they are grouped together to perform at the company's Dream Festival. To rise to the top, they must collect Dorika—cards given by the audience that idols use to form their stage outfits—and gain the audience's attention. However, the road to fame is a rocky one, and the boys must form a bond of friendship and trust before they can reach their goals.

The final battle against the Dark Territory drags on, as players from all over the world flood the Underworld's servers and plunge the Human Empire into utter chaos. Asuna Yuuki and her friends defend their new allies with everything they have, but their numbers are falling. Meanwhile, Alice Zuberg heads toward the World's End Altar while Gabriel "Vecta" Miller relentlessly pursues her. Meanwhile, members of Rath strategize a plan in an attempt to restore Kirito's damaged fluctlight. However, the intruders occupying the main control room have other plans. Surrounded by death and despair, when all hope seems to be lost, one voice reaches out to Kirito—a familiar one saying, "I will always be by your side." Sword Art Online: Alicization - War of Underworld 2nd Season is the epic conclusion to Akihiko Kayaba's dream of creating artificial human intelligence. Now it is up to Kirito and his friends to protect this collapsing world from the people that still think it is just a game.