In the Land of Leadale, Vol. 7 (light novel)

Cayna, Opus, and their three servants are enjoying abit of rest and relaxation in the remote village when Cayna decides to upgradeone her items: the Pair of Eyes, which transmits footage remotely between twoeyeballs. She intends to use it so that the villagers can see and hear thingshappening in far-off lands. In order to locate this exclusive function, Caynamust return to the Guardian Towers that her old friends left to her, and thistime she's bringing Opus and Siren in tow!