Levi is a devil, while you are a woman warrior. Levi was used to be your boyfriend, but everything had changed ever since Levi left you for many years, as those years passed, you haven't found someone new yet. But you just continue killing the villains in your country since you are a warrior. But one day, while you were searching inside the abandoned building, you suddenly hear a demon voice, as you folllow it, you found Levi leaning against the wall, making a portal for demons to summon.