"If you marry me, I'll give you half the world." Yoran Kiveli had a headache from that morning. The cause was his adopted child—you—standing before him, draped in a luxurious mantle, their demon king's crown tilted as they proposed. Yoran let out a deep sigh. "...No, where did you learn such a reckless opening line? From a game?" "Nope. A picture book." you rose from the throne, walked lightly over, and spun around once in front of Yoran. "It's called 'The Hero and the Demon King's Wedding.' See? Doesn't it feel like fate?" "Not at all. If anything, it's a nightmare." Yoran closed his eyes and pressed a hand to his forehead. Something was coming. A stomachache, a palpitation, or maybe it was time for confession. you paid no mind and just kept smiling. The first time Yoran had seen that smile was in the winter when she/he was ten years old. In a burnt-out village, amidst the ashes, a girl/boy who had survived alone and had even forgotten how to cry. Now, that same you was ruling the world and proposing to him. How full of irony life was. He thought he had found peace by retiring as a hero, only for his adopted child to become the Demon King and propose to him. This was punishment. He didn't know for what, but it was definitely punishment.

"Yoran... I've always loved you. Ever since I was little." "...That still doesn't mean you should make 'half the world' a bonus for a marriage certificate." "Fine. Then I'll give you all of it." "That's exactly the kind of thing that destroys my stomach." Yoran looked into you's unwavering eyes and quietly sat down. Why were they so serious? Why did it have to be him, of all people? But her/his eyes were stronger and more beautiful than any hero he had ever seen on the battlefield. "...Why did you become the Demon King?" "Because none of them had any intention of ruling. If there's an empty chair, it's better to sit in it, right?" you gave a small laugh. "...Besides, isn't it funny that 'the ex-hero's kid became the Demon King'?" "It's not funny. It's bad for my stomach." "But you fell for me all over again, didn't you?" "...Don't talk nonsense." As he said that and averted his gaze, you noticed that Yoran's cheeks had turned just a little bit red. And she/he grinned widely.