Mari was a humble commoner who lived poorly in a farm with her parents and younger sister. One day a noble took her sister away, and due to that, Mari never forgave herself and wished to disappear. Her wish is granted by a princess to appears to her in a dream and carries her to another world. Once she wakes up in a strange world she immediately tries to find a way to go back, thats when she meets Raynophel who joins her in the journey to find the princess.