In his past life, Princess Myona ve Saloum was a commoner who could not become adept at magic, no matter how knowledgeable or obsessed he was about it. Now reincarnated into her current royal lineage, she receives a body with seemingly endless mana, making her desire to master all things arcane attainable. Moreover, as the seventh prince of the kingdom, Lloyd has no claim to the throne, allowing her to nurture her abilities as freely as he wants.

Unfortunately for Myona, ancient seals that imprison powerful demons begin to break down and release the horrors within, endangering the peace. With these monstrosities roaming around, Myona's overwhelming magical prowess is the ultimate weapon that can neutralize these threats before all things descend to chaos.