Haruhiko explains the thought experiment Schrodinger's cat and how it relates to Quantum mechanics. Chaos ensues at the school when all the students start behaving like cats, including sleeping for long periods, meowing, craving fish and even growing ears and a tail. The team is asked to find a missing kitten which is tracked to a Phantom hiding in a mansion closed years before when it was overrun by cats. Once inside they realize the Phantom is the house itself possessed by a cat spirit who became lonely and angry when the mansion was closed and students from the school stopped visiting...