Suteki Tantei Rabirinsu (Fantastic Detective Labyrinth 05)

Fantastic Detective Labyrinth 05 - The Old Capital's Elegy Yaya has been absent for several days, and Mayuki and his friends decide to visit her in the industrial city district. Later on, they find out that the Industrial Center that Yaya resides in is actually extremely polluted, and her brother, Shichirou is a key witness of an upcoming trial against the town's mayor, who has been harassing the family by sending thugs.