High Spec Devil King and Around 30 Hero
Luke, the brave 27-year-old hero, is destined to defeat the Demon King, but to his frustration, the Demon King never appears! Impatient and eager for action, Luke sets out on a quest to find him. To his surprise, he discovers that the feared Demon King, Aster, is actually a charismatic and powerful CEO of a major company. Instead of a fierce battle, Aster proposes a unique solution: a contractual marriage...!?
(Source: Kadokawa, translated)
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