Purify the cursed monster girls with a thrust of your divine scepter!

Long, long ago, a solitary demon lord appeared on the continent of Roguume.
He swept across the land in a mad conquer, accruing the forces of western regions,
transforming the people into monsters,
feeding his own bottomless gluttony for power,
until at last the princess fell victim to his advances and the kingdom was lost.

The people waited for a hero to save them from tyranny. A legend began to spread.

"He who possesses a great and lengthy penis...
Will become the savior of the world..."

Many men had tried their measure.
Now a young man with an enormous c*ck slipped himself
into the scabbard... and fit perfectly. He was the savior.
It was foretold that he will wield his holy scepter and restore the kingdom......

[From DLsite English]