This is a secondary creation game based on the theme of SAO (Sword Art Online). The story begins with Kirito discovering information about Cardinal in the Great Library and learning that there are three sealed chambers in the remote Western Mountain Range, each locked with three keys. Kirito and Eugeo embark on a journey together to unravel the mystery of the seals.
The game consists of six chapters, and upon completing each chapter, character memory stories are unlocked. Simultaneously, trap-related stories unfold within the labyrinth.