I was reincarnated as a young female count. While feeding my guardian, the duke, I plan to use my all-purpose magic to create various things for the development of my territory.

Martine's sleazy father suddenly dies after a carnage at her wedding. She gets caught up in the chaos and faints, but when she wakes up, she finds herself remembering her past life. 　I was in my late twenties, but now I'm a beautiful 12-year-old girl! And as the only daughter, I'm going to inherit ...