In the mystical Hoshimiya City, Yakumo and the charming Hijiri embark on a covert investigation into a peculiar event. Their journey leads them to Hoshimiya Gakuen, a prestigious academy known for nurturing spirit mediums. As they delve deeper into the mystery, they attract the attention of the school's authoritative figures, the student council president Houshou and vice president Domon. Unexpectedly, the quartet finds themselves entangled in the unfolding incident, their paths intertwining in unforeseen ways.