Description：In an ordinary high school, the transfer student Xiaojun (played by Kiyoarashi Tamoto) who likes to develop game software is bullied by Takuro (played by Shota Matsushima) and Xiaowu (played by Reo Kanshuji), and finally refuses to go to school. On this day, the class monitor Anna (played by Taira Yuuna) asked Hong (played by Nakagawa Daishi), an excellent student who used to be very close to Xiaojun, to visit Xiaojun's home. On the way, Hong was attracted by the mysterious blue butterfly, and unknowingly came to the abandoned house JailHouse, which was said to be haunted. Standing at the scene are Takuro, Xiaowu and Mika (played by Hisamatsu Ikumi). They plan to enter the JailHouse to explore and take real-time videos to broadcast online. Suddenly, there is a strange noise in the house. Xiaowu tries to escape, but finds that the exit is blocked. Takuro, who is too proud of himself, has not expected that they have already stepped into the JailHouse.