Final Fantasy. Volume 6 Lost Stranger

In search of a way to undo Rei's frog transformation before escaping the Mysidia Royal Library's labyrinthian halls, Shogo realizes he'll have to trick Byblos into casting "Toad" on Rei again to reverse the spell's effect! They set their plan into motion with Alus's help, but Byblos won't be fooled so easily…