Satsuki Miyanoshita & his little brother Keiichirou Miyanoshita are new in a school that is haunted, They met 3 new friends Hajime Aoyama, Reo Kakinoki & Momoko Koigakubo 5 of them was chased by Amanojaku the demon But was captured by a spell cursed from a special book that was belong from her mom & was became as a black cat (Kaya, their pet cat)