Tensei Maou-sama wa Yuusha ni Katenai!New転性魔王さまは勇者に勝てない！; Ma Vương TS Không Thể Đánh Bại Anh Hùng?; Genderswapped Demon Lord Can't Win Against the Hero!

The Strongest demon lord of another world becomes a cute girl! In a world not our own, there once reigned a Demon Lord who controlled the entire realm. However, in the midst of a battle with a female hero, a magical accident caused him to be transported to modern-day Japan. And when he came to, the demon lord had turned into a girl! To make matters worse, right after he arrived, he was nearly attacked by humans. With no magic, no physical strength, and utterly powerless Absolutely cornered. Just as he thought that Come with me! His rescuer turned out to be the female hero. Apparently, she had been transported here along with him. And so, the demon ling found himself under the heros care. But what fate awaits him?