Sword Art Online: Side Story (There is But One Ultimate Way)

Synopsis:

Kirito awakes in a bed in Underworld and soon realizes that he's surrounded by Alice, Asuna, Leafa, Silica, Lisbeth, Sinon and Yui. After they wake up, they start talking and Kirito asks for answers about what's happening. In the conversation they reveal their uncertainty about the future, as Asuna and Lisbeth are about to graduate, and chances for meetings may become rare.