Gokuaku Reijou ~Reijou ni Tensei shita Saikyou Rouhei wa Skill "Madan" de Musou suru~

Kiran, the strongest old soldier who fell in battle against the Demon King and lost his life, accepts a proposal from a goddess and is reincarnated. However, his new life begins as the daughter of the Heikera Baron family...!? The story follows the adventures of Kikka, the reincarnated daughter who retains the skills of her former life as a seasoned warrior, particularly the powerful "Magic Bullet" skill. As she boldly rises to prominence, her bravery attracts people to her side.

Links:

• Webnovel