“I want to help people.” Saint apprentice Emilia has special conditions that make her possible to possess a huge amount of magical power… it’s like that but, because of the influence of magical power in her body, she is always hungry and sleepy. However, her encounter with a caring “Almighty Great Witch” Abigail who loves to have a slow life dramatically improves her life, and the result — the magical power that can’t be demonstrated at “Black Monastery” because of poor treatment, explodes! Just filling her stomach makes her stronger. Just sleeping soundly makes her surrounding friend get stronger. Just gently petting the old dog which is the great mythical beast fenrir!? This is the start of the “Slacker Saint” having the strongest peerless slowlife to help people. I just want to have a peaceful livelihood, but become stronger just by eating and sleeping…!?