"Yes, Ootsuji Detective Agency" In the purple smoke lies a faint dream, and in the town, rumors swirl like smoke. Now, facing the strangeness of the "mass disappearance" bewildering society, detective Soutarou confronts it! With no witnesses and unclear intentions, the identity of the "ominous tracks" that always appear in its footsteps... In search of clues, the detective delves into the underground realm of the town called "Kuragari." There, the encounter with the black iron armored train and its commander, Tanne, will significantly shake the fate of the detective!
An underground world dug out 
without any kind of plan.
عالم تحت الأرض حُفِر
.دون أيّ تخطيط
hat sich unkontrolliert eine
Untergrundgesellschaft ausgebreitet.
Hay un sinfín de proyectos
sin terminar bajo tierra.
Hay un sinfín de proyectos
sin terminar bajo tierra.
Le monde souterrain s’est formé
sans plan défini.
Un mondo sotterraneo costruito senza alcun piano.
O mundo subterrâneo
cavado sem planejamento.
Один чёрт знает, как запутан
наш подземный мир.