Everyone knows her, but the unknown story is——. The beautiful port city "Numaz" surrounded by mountains and sea. The girl Ye Yu, who has never been familiar with the surrounding things since she was a child, lives a life of keeping a distance from everyone in the city. What I want to do, my true destination, is——. Together with the girl who can't be frank, stroll in the incredible world you are familiar with. "Ye Yu of the Mirror-SUN SHINE in the MIRROR-" Another sun has appeared now.