Hey hey~ Author-san here! So- this story is about Paimon's life as the lone survivor while almost everyone she knew has passed away, including you, the travaler, this is basically like- a diary sort of format, remember, this is an AU, and an AU is another universe. And in this AU, she's about 3000 years old and it has been 500 years since you, the traveler, and along with other companions, perished, enjooyyyy~