In a world of magic and monsters, Krylancelo Finrandi and his foster sister Azalea Cait-Sith were once promising students of sorcery, prodigies at the famous Tower of Fangs. But an experiment gone horribly wrong warps Azalea's appearance, trapping her in the form of a dragon. Elders at the Tower—more interested in preserving their reputation rather than their students' lives—drive off the transformed Azalea and cover up the incident. Outraged, Krylancelo strikes out on his own, taking the new name of "Orphen" and vowing to return Azalea to her normal state. Five years later, Orphen's quest has stalled. A chance encounter brings him face to face with Azalea again, but he still has no way to restore her body. And with a hostile group of sorcerers hunting her down, he may be running out of time. The past and present collide as Orphen tries to find how to save Azalea from their former teachers and friends. A sorcerer who was once the top student of the famous Tower of Fang, now spends his time chasing around his hopeless clients as a moneylender, at least until his client comes up with a plan to make money: marriage fraud. Unwillingly being dragged in to the plan, Orphen encounters a monster who has long been his goal since the day he left the Tower of Fang. Between those who seek to kill the monster and Orphen, giving everything to protect the monster, his lousy but peaceful days end. Trying to turn back his sister, Azalie, back to her true form leads to many more mysteries and the key to the secret to the world.