Jeanne

A soft-spoken but strong-willed, normal girl from Earth who is one day mysteriously transported to the MO world of January. She learns of an ancient war between angels and demons, which ended in the deaths of both the Demon Lord and the January Magician who killed him.

While she's wandering somewhat aimlessly in the forest, she happens upon a quaint cottage, the residence of the supposedly deceased Demon Lord. He looks as equally surprised to see her, but his gaze softens and he politely invites her for tea and eventually a place to stay.

Having nowhere else to go, Jeanne decides to accept his offer. Thus begins their peaceful life together, until the truth of Jeanne's appearance and more come into play.