Hirune was working at an exploitative company when she received a divine protection from a goddess and was reincarnated into another world. And that's how she began her new life as the golden-haired Heerune.

However, she was intent on not working as laboriously as she did in her previous life and for that reason, she became determined to become a Great Saint so she can live a relaxing life.

With this begins the legend of a sleepy Great Saint who goes at her own pace and the story of her slow life.