Yohane the Parhelion: Numazu in the Mirage is a deck-building roguelite set in the world of Yohane the Parhelion.

While working as a fortune teller in Numazu, Yohane spends her days with her friends. By chance, she comes into possession of an old mirror. Worried that her fortune-telling is not accurate, Yohane decides to play "Magic Mirror Fortune-Telling" using the mirror, Suddenly, she is sucked into the mirror, which begins to glow. What she finds in the mirror is the "Ura-Numazu," which is the exact reverse of the real Numazu! Moreover, it was a mysterious world where magic could be used with the power of cards. At the same time, strange things happen to the friends in the real world one after another. In order to save them, she must go through the "Ura-Numazu"! What awaits her? A world of mirrors that changes its appearance every time she enters. After countless choices, what is the future that Yohane will choose? A new story begins in the other Numazu!