Anyone know this manga?

This office worker dies and is given the chance to reincarnate as a hero, and to choose her abilities. She goes ham choosing all the powers she wants and since she loves books, she makes a bookstore slash cafe. Sje puts magic on the books to protect them from food and makes beads with protection magic, her specialty, to give to the guy she likes and other knights. She also asks that the hero marking be put on the back of her head so she can stay on the down low, and the the male lead is a guard or captain of the kingdom she “spawns” in. It’s romance and they’re both book lovers, it’s all black and white and ml has long hair, anybody know what it’s called??? It was so wholesome and it’s totally gone from my “already read”.