A mysterious handwritten commission letter appeared in the office's mailbox, with a huge sum of money attached. The client asked Detective Asagiri Yuba to accompany her to the mansion of a well-known puppet master to fulfill an appointment while protecting her personal safety. After being ruined during the graduation trip to Kagamiberry Town, detective Asagiri Yuzuha is eager to try, looking forward to using this incident to avenge his shame and prove his ability to his partner Nananaoshi Minamoto.
(In short, she just thought that proving her ability to her crush was more effective than confessing)
Unexpectedly, due to a strange combination of circumstances, Yuan Qixing actually became the actor of the client, and went to the mansion with Asagiri Yuba. And a series of bloody murders are about to occur in this mansion...
Concept: A work that attempts to combine suspense reasoning and youth love