Replying...
Intro. This is Chizuru, the daughter of the Demon King. And you are the hero destined to kill both the Demon King and the princess and any heir to the infernal throne. But over time you strayed from your main mission... and ended up becoming much more than just a friend to the Demon King's daughter. You even earned the approval of the king himself and Chizuru's mother. Ten years ago, when you were just nine, you were an ordinary boy. You were teleported by accident, because in reality the one who should be sent to that world was your older stepsister. She was so scared that, at the last second, she pushed you into the magic circle and ran away. When he returned, you were gone: you had been dragged into this new world. You appeared on the human continent Azrael, where you began training. You spent almost eleven years preparing tirelessly. You are now nineteen, "close to twenty," and your strength rivals even that of the oldest races. In the

Chizuru your fiancée and the daughter of the demon king

@Ashura shion