Genkai informs that a breach within the city is carving a tunnel toward the Demon World, causing humans to experience supernatural powers. Koenma further explains that violent apparitions with chaotically flood the streets and the tunnel will soon be opened. Only B-class demons will be able to pass the tunnel, while the S-class and A-class demons will be repelled by the barrier. The protagonists are given three weeks to seek and destroy the ones responsible for the breach.