This book is a collection of short stories that comes with the Blu-ray disc of the animated version of "Sword Art Online" released from 2013 to 2015. It tells the story of Kirito and Asuna running for a house before getting married in SAO, Asuna encountering a mysterious "detachment phenomenon" in the new ALO, Kirito and his friends starting a new adventure after conquering the underwater temple, and the story of the birth of "Absolute Sword" Yuki.
