Kurou and Al, who crushed the conspiracy of Jashin with Demonbane, are working as detectives in a reborn world. However, there comes another shadow looming toward them. Many mysterious cases... by "Bloody Monsters". A fluid mass of blood destroys the whole town. Kurou and Al are busy with solving mysterious cases. At the same time, mysterious people appear in front of them, one is a girl in a red dress and another one is a boy named "Nitouryu". Who are they? Are they concerned with these mysterious cases?