Kono Deai wa Akuen ni Chigainainoni

Enya Valencia, dreaded master of the enchanted Hexenkeep of Morgenda, has a new enemy - the celebrated knight of radiance, Helios. The hatred is mutual, but so is their fate of certain death... unless they meet one condition: they must sleep with each other. "...Shall we start by kissing, hexenkeeper?" So begins their spiteful romance - at the pinnacle of carnal affection. (Source: Pocket Comics) Note: First released in English, with the initial eligible release in Japanese followed by Korean, making it a manga by our standards.