Polda, where three years ago ruins were discovered under a cemetery on the outskirts of town.
An abnormality in magical power was found in the vicinity of Polda, and Royal Knight Regina,
disguised as an adventurer, was ordered to investigate the cause of the magical anomaly and resolve it.

While she gets lost on the way, Regina somehow manages to reach Polda
and proceeds with the investigation of the ruins. It is during this time that she encounters
a monster named Astrid. After a battle, Regina falls victim to a curse cast by Astrid,
causing her own magical power to transform into lust.

Regina learns of a way to break the curse, but she is told that she needs the bodily
tissues of the one who cast the curse for the purification ritual.
Additionally, a fee of 1 million gold is demanded.

Will Regina be able to lift the curse and fulfill her duties as a knight?