The Demon Slayer Corps' Strictest Mother

Chiyo, a noblewoman, was married off to the well-matched Ubuyashiki family at her parents’ arrangement. Her life was ordinary and dull, neither particularly unhappy nor particularly happy. She never expected that after her death, she would be reborn into the Ubuyashiki family a thousand years later as a young lady from a branch family. The Ubuyashiki family had changed beyond recognition in the intervening millennium. Not only did the men in the family die young generation after generation, they also fought demons. What was going on? What were demons? And why could she see the future now? As one of the few in the family with the ability to foresee what was to come, she was assigned to assist the head of the family. There, she learned that a thousand years ago, someone in the Ubuyashiki family had turned his back on the gods. He became the first demon in the world, and the Demon King they faced today. He was bloodthirsty and cruel, with no empathy whatsoever. His name was Muzan. What kind of name was that? If she ever found out which disobedient descendant was responsible, she’d give him a taste of her Nichirin Blade! But first, she had to help the Ubuyashiki family as it was now. They were all her descendants, after all. She couldn’t stand by and watch them die young one after another. So she began using her ability to see the future to make money, attract investors, and search for demons. Sometimes, she even dreamed of what her frail, sickly son Tsukihiko had grown up to look like in her previous life. The one thing she’d worried about most when she died in her former life was her sickly child. She never imagined she’d be able to dream about him so often after being reborn. It really was true that a mother and child were connected at the heart. Under her leadership, the Demon Slayer Corps grew stronger by the day, and finally won the government’s recognition. It was then that she at last saw the legendary Demon King! The moment Chiyo saw that familiar face, she was stunned! Who could tell her why the Demon King before her looked exactly like her frail, sickly son? Realizing that this wayward descendant was her own child, Chiyo marched up and slapped him. Muzan covered his cheek, unable to believe it. “My mom never hit me… Wait, no, she just did!” Content warnings: The female lead has no romantic storyline. Everyone is strictly platonic, though she is regarded as their mother. She has a very powerful golden finger. Happy ending. Theme: Passion, hard work, and perseverance