Sword Art Online SS: Calibur SS-han
ソードアート・オンライン SS キャリバーSS(すこししっぱい)版
The alternative version to the Caliber SS in volume 8, where they decided not to save Freya in the dungeon. The SS in the title means 少し失敗 (sukoshi shippai) which translates to Slight Failure.