18if Teenager Haruto Tsukishiro wakes in a strange dream world and finds an app that summons a witch. A white-haired girl saves him, revealing the witch’s nature before vanishing. Haruto later meets Katsumi, a talking cat researching dreams, who believes the girl is “Lily,” a recurring entity. Together they learn witches are victims of “Sleeping Beauty Syndrome,” trapped in comas until defeated in dreams. After defeating the witch, Haruto exits through a blue door—but wakes in the same dream room, determined with Katsumi to uncover the truth behind Lily, the witches, and his endless dream.