Haruto Tsukishiro wakes up in a peculiar dream bedroom and discovers an unusual app on his phone. Upon activating it, he encounters a witch who attempts to pull him into her realm. Rescued by a mysterious white-haired girl, Haruto soon learns about the witch's curse. With the help of a talking cat, Katsumi Kanzaki, they evade the witch's minions and uncover the identity of the enigmatic 'Lily.' Together, they defeat the witch and strive to unravel the secrets binding them to the dream world, facing unexpected twists and challenges along the way.