Fairies may kidnap a human child and replace it with their own a changeling. Now, it seems that such an incident took place in one of the Blue Knight Earl’s territories, so Lydia, Edgar’s fairy doctor and reluctant fiancée, sets off by herself to investigate. Meanwhile, the earl is visited by some old pirate friends whom he would have preferred to have stayed in his past. They tell him that their companion, Betty, has been kidnapped by someone claiming to be the Blue Knight Earl, but this is the first Edgar’s heard of it...
Mizue Tani is a female light novel writer from Mie prefecture. Graduated from Mie University, in 1997 she won the 6th Shueisha Roman Grand Prize Honorable Mention thanks to her work "Paradise Renaissance-Paradise Revival". One of the most representative works of Mizue Tani is the "Count of Cobalt Bunko and the fairy" series. Her first work for the general public was "I will repair it at the time of memory". It was a hit, selling over 200,000 copies in Japan.