Every night, when the residents of Kasugabe fall asleep, they will come to a magical and beautiful dream world. There, they can realize all the wishes they want to realize and meet all the requirements they desire to meet. This dream world is full of joy and happiness. One day, a girl named Kanba Tamazaki moved to Kasukabe City with her parents and became a new part of this city. However, from that day on, no one has ever had a sweet dream again. The once warm dream world is now full of pain, sorrow and fear, and the disasters in the dream have gradually continued into reality. All this happened, obviously with Tamazaki. In order to find out the truth of the incident, Xiaoxin (voiced by Akiko Yajima) teamed up with Fengjian (voiced by Mashiba Mari) and Nini (voiced by Lin Yuxu) and other friends to investigate.