Reid, a hero who lost his life during in a fight with a devil, was reincarnated as a daughter of a married couple who were his fellow comrades!? Although he was reborn as a baby again, with "as expected, I couldn't breast accept milk from my former fellow comrade" in her mind, she refused to receive the breast milk from her new mother who was her former fellow comrade. As the result, she grew into a weak beautiful little girl. however, Reid realized that the daughter of the hero and the saint could become stronger than anyone. with the experience of her previous life and the talent from her new parents, she had a dream to become a magical swordsman, and also aimed to become a hero again.