Taigan no Meru - Yuumei Tantei Chousa File

On my way to school, I met a girl with pigtails and a mysterious atmosphere.
Her name was Mel Shirakawa, she was able to communicate with non-human things, such as plants, animals, and even ghosts!

The encounter with Mel, a girl who hears the voices of the dead, led to this encounter,
Wakiya, a boy with a sharp mind, starts a detective business specializing in ghosts!