Hero and Demon King is the Newlywed English

In a world called Esteria, for thousands of years a war has been fought between the royal alliance on the Prossa continent against the royal alliance on the Edda continent, the war that lasted for thousands of years had brought enormous destruction in the world of Esteria, this made Merliana, the strongest entity in Esteria became angry, Merliana then condemned this world, if they remained stubborn to continue the war then this world would be swallowed up by abbys, reluctantly, eventually the kingdoms on both continents made a truce, and as proof that they were at peace they finally married Freyja Arnlaulffrson Princess of the Midgard Kingdom with Loki E Veil The new King of the Muspelheim Kingdom, this is the story of two people who hate each other, mortal enemies on the battlefield who are forced to marry, live and go to school in the same place while continuing to pretend that they love each other for the safety of their world.