Suteki Tantei Rabirinsu (Fantastic Detective Labyrinth 01)

Fantastic Detective Labyrinth 01 - Kyuto's Great Detective. There's a rumor about a white-faced ghost living within an old mansion in the woods, some students decide to investigate. Meanwhile, two city detectives decide to track down a mysterious informant who has been helping them solve some difficult cases via phone tips. At the end, they meet the mysterious young Mayuki and his house staff.