The Crazy Son-in-Law of the Northern Duke

Galahad, a top elite mage of the Intelligence Agency, is sold off as a live-in son-in-law to the Northern Duke for political reasons. The ice-cold daughter of the Duke is actually the “key to defeating the Demon King and saving the world.” To capture her heart, Galahad approaches her with his usual logic-defying madness and determination. However, his counterpart is a Sword Master capable of burning mana, meaning that merely holding her hand causes the mage to endure excruciating pain piercing through his entire body… “I want to touch her again. This time, a little longer—.”