The young Ayan once met Echizen Ryoma in the woods of the park who was entrusted by his father Nanjiro to worship at the shrine. The first meeting ended with the little girl becoming visibly happy and Echizen Ryoma confused. The reason is that this is not a world that Echizen is familiar with. Even though he can understand the language of this strange country after eating the "witch fruit" given by the shrine maiden, Ryoma Echizen is panicked by the fact that "it seems that only the little girl Aga can see him", and later becomes the ghost behind the little girl Aga.
As Echizen Ryoma watched the little girl grow up, he felt a sense of relief in his heart that "my children have grown up." There is a unique connection between him and Ayan, which makes them rely on each other even more. Just when life was gradually moving towards a stable road, a sudden car accident broke everything. In order to save Ayan, Echizen Ryoma chose to disappear. But when he woke up again, he found that this was his world and Echizen Ryoma was back. But along with Ayan's three years, it was just a three-hour nap here. Echizen Ryoma almost thought that his days as a ghost were actually an unreal dream...
After finishing the entire US Open, he became restless. Echizen Ryoma was informed by a witch's divination about Ayan's current situation. In order to open the heart of the little girl in his memory, he decided to go to that strange world again.
But the little girl forgot about him and the time the spirit behind her named Echizen Ryoma lived with her...