Superior

A demon queen defeated numerous powerful creatures and killed more than half of humanity. The remaining humans chose a hero to kill her and end her reign. The hero, however, doubts his mission, believing the monsters are sentient and alive, causing him inner conflict. Sheila, the demon queen, becomes intrigued by him and joins his journey, concealing her true identity with the intent to kill him once she earns his trust. Over time, she discovers she has fallen in love with him, leading to a new path for both. A chapter titled "Ai no A○ron" is included.