Sword Art Online Alternative Clover's Regret Novel Volume 3 was written by Soitiro Watase and Reki Kawahara.

When a mysterious woman with a detailed knowledge of Klever's offline identity shows up, Nayuta and Koyomi can't hide their unease. What is her relationship to the eccentric detective? And how will Nayuta's change when she winds up staying over at Klever's house in the real world? Find out in this third and final installment!