Izumi Mizushiro is an astrologer who works out of a corner of a coffee shop called Rino, where she divines for clients with her younger sister Towa by her side. Watching her clients leave with smiles on their faces is enough to make the work feel worthwhile. Then unusual things start happening — a surge of requests, trouble she cannot explain, and a girl named Maki who arrives and sets a chain of unexpected events in motion that disrupts the peaceful rhythm Izumi has carefully built.