Team OneOne Anime

Business is slow for the Ootsuji Detective Agency. Sotaro and his juvenile sidekick Saki will take any job that comes along, even one that sounds like a lot more risk than it’s worth. It’s festival season in the city but away from the public eye, a wave of mysterious disappearances has occurred. A newspaperman hires Sotaro to investigate, suggesting that answers might lie somewhere in the Dark, the notorious, anarchic maze that is the city’s physical, social, and moral underground. Sotaro subcontracts the gig to Saki, but soon enough regrets it when the kid also goes missing. Now Sotaro is obligated to venture into the Dark himself, and confront its dubious subterranean denizens, including the malicious Laughing Masks gang and the renegade police squad piloting the fearsome Demon 463 armoured train!

(Source: Fantasia Festival)

In the coal mining town crowded with small-scale miners, known as the "Hakoniwa", there is a girl named Kagari who runs a map shop, and her childhood friend Yuya, who dreams of breaking free from the "Hakoniwa" and the ever-changing labyrinth-like tow. Lately, suspicious "sinkhole accidents" occurring frequently in the town begin to encroach on their daily lives. Will Kagari be able to overcome this situation and determine the fate of the town? Beyond the challenges, the girl will grow up a bit today.

(Source: Crunchyroll)