One day, 10-year-old Fari von Dazel remembers that she was once a man named Yukihoko Nanjo, reincarnated from a different world—Japan on Earth.

Despite having requested that her stats remain unchanged upon reincarnation into another world, Fari possessed a rare magical talent. What's more, she was the daughter of a noble. Far from staying the same, everything had changed!

Due to her exceptional talent, she ended up attending the Royal Hunter Academy at her father's decree. During the entrance exam, she became friends with the mysterious blonde beauty, "Regret." Upon enrollment, she formed a team with her older sister, the vampire "Quella," and her beastkin friend, "Anne." She had wished for a normal life, but Fari's days were nothing but lively!

This is the story of Fari, a girl who was once Yukihoko Nanjo, as she confronts her magical talent and lives in the world of sword and magic, "Phantasm."