Maou no Musume wa Yuusha to Seiryaku Kekkon Shitai

For generations, the demon nation of Idéal and the human Étoile Kingdom have been locked in a relentless war, their conflict defining the bitter history between their peoples. When the Demon Lord finally extends an offer of peace, it comes with an extraordinary condition: a political marriage. And so Princess Lieselotte, daughter of the demon race, is wed to Schmerz, the very Hero who stands as humanity's champion, and sent to live in enemy territory — effectively serving as a hostage to guarantee the fragile truce. Yet Lieselotte is far from a passive pawn in this uneasy accord. The marriage is merely the opening move of a far greater ambition she quietly harbors, one she intends to pursue from deep within the heart of the human realm. Between her and that goal stand countless trials: the burden of her role as a living pledge between two wary nations, the scrutiny of those who surround her, and hardships yet unknown. As the demon princess and the human Hero begin their unlikely life together, Lieselotte must navigate every danger in her path if she hopes to see her ambition through to the end.