Eight DVD-only episodes.

BD/DVD specials.

Shurannosuke Sakaki is a masterless samurai with a razor-sharp katana and a cold-hearted personality. Whenever you see the mark of two crossed scythes on his back, death is sure to follow. Because of his exceptional swordsmanship, Shurannosuke is hired by the Nakura Clan to rescue Princess Mayu from the Seki Ninja. In this mission, he must use his full potential to survive the Seki Ninja's notorious henchmen. (Source: ANN)

The story is set a couple of years after the events of Sword Art Online, where Kazuto Kirito Kirigaya and his sister Suguha meet up with Asuna Yuuki, Rika Lisbeth Shinozaki, and Keiko Silica Ayano at the SAO Survivor School. Kirito then attends emergency counseling, while the girls go for a swim at the pool. It turns out that said emergency counseling is a subterfuge set up by Seijirou Kikuoka, aiming to rehash the incident of Sword Art Online in hopes of determining Akihiko Kayaba's motives. What will the girls get up to in the pool, and what awaits Kirito and his counseling?