Our inspiration comes from the Japanese science fiction novelist Yasutaka Tsutsui's last work "detective dream ", and an animated film of the same name directed by Satoshi Kon was released in 2006. The story is about someone steals dreams to reality while dreams erode the real world. This collection is divided into three themes: DC MINI, Dreamland Exchange Bank, claw butterfly. The first theme is based on the technology instrument that can dive into the dream, DC MINI. The second theme is a virtual dream bank created by the fusion of reality and dream while the third one is drawn from the moonlight butterfly, which represents death and hope, dreams and reality.