After their first kiss, Kaguya Shinomiya and Miyuki Shirogane are left unsure where their relationship stands. The troubling uncertainty of whether they could be considered an official couple unleashes newfound problems as both Kaguya and Shirogane struggle to sort out their feelings. While the lovestruck student council officers fret, the Christmas season rolls around, and romance is in the air. In the face of widespread tenderness, Kaguya and Shirogane must endure their affectionate battle of wits once more. Should they reconcile their feelings for one another, they may find themselves within reach of what they have both been longing for so long: true love.

Short spin-off episodes included in Blu-ray/DVD volumes of the main series.

After vanquishing another boss and stepping through the gates of the fifth floor, the misfit duo Kazuto "Kirito" Kirigaya and Asuna Yuuki are greeted with a beautiful landscape of crumbling ruins and catacombs steeped in mystery. This idyllic adventure is short-lived, however. Tensions between the Dragon’s Knights Brigade and the Aincrad Liberation Squad—the two leading guilds focused on clearing Sword Art Online—continue to rise and threaten the fragile stability of the frontline raiding group. Kirito and Asuna are forced to act quickly, making a desperate gamble and gathering a small number of allies for a dangerous mission. As a result, Asuna and Misumi "Mito" Tozawa must come to terms with their relationship after the near-tragedy that forced them apart on the first floor.

The world is on the brink of destruction after a devastating ten-year war in the "shadow labyrinth." Desir Arman is one of the last skilled magicians left standing, but even he is no match for the formidable foe threatening humanity's very existence. Just when he's certain the end has come, he is sent back in time to his early days of studying magic at the prestigious Hebrion Academy! With this rare second chance, Desir is determined to save not only himself but also the friends and comrades he once lost. Armed with the knowledge of what their future holds, can his efforts make a difference, or are they all doomed to relive the same terrible destiny?