As Haruto Tsukishiro awakens in an unfamiliar dream world bedroom, he discovers a peculiar app on his phone. Upon activating the program, he is confronted by a strange woman who attempts to drag him into her realm. Fortunately, a mysterious, white-haired girl intervenes and facilitates his escape, unveiling the woman as a witch. However, their discussion is cut short, and Haruto is thrust back into the witch's realm, where he encounters an anthropomorphic cat named Katsumi Kanzaki. As they are pursued by the witch's minions, the white-haired girl seizes the opportunity to open a door for their escape. After their harrowing experience, Haruto describes his rescuer to Katsumi, who recognizes her as "Lily," a recurrent entity throughout many dreamscapes. They hope to find a blue door that will take them out of the dream world and, once again, venture into the witch's domain. Upon entering, they find themselves in peril, but Lily discloses the truth to Haruto: witches suffer from "Sleeping Beauty Syndrome," a coma-like state induced by real-world tribulations. Consequently, they can only be roused by their defeat within the dream world. After conquering the witch and locating the blue door, Haruto and Katsumi part ways with the assurance of meeting again in reality. However, Haruto awakens back in the dream world bedroom and is determined to unravel the mysteries of the witches, Lily, and his inability to depart the dream world with Katsumi's help.