I Became an Execrator Knight Who Fights Beside Magical Girls Using a Forbidden Power

In a city protected by magical girls who purify corrupted beings, a forbidden hero appears. Haru becomes the Execrator Knight, a masked warrior who fights beside magical girls using a power that does the unthinkable: instead of purifying corruption, he destroys it. As three magical girls—Aoi, Reina, and Mio—battle to protect the city as a united team, the Execrator Knight walks a different path, one that slowly separates him from them. Enemies grow stronger, secrets resurface, and the line between justice and necessity begins to blur. Can a hero who destroys truly fight alongside those who save?And what price must be paid for using a forbidden power? A dark magical girl fantasy with slow-burn romance and moral conflict.