Toono Bijutsukan

Overview

Do not open the door of the museum at night… Detective Miki of the Kita-Akasaka Police Department visits the Toono Museum of Art, where "strange rumors" are whispered about, to investigate a case of theft. While searching for Kanae Toono, the director of the museum, he witnesses a young man falling from the roof. Feeling uncomfortable with the director's attitude, Miki goes to the museum again late at night, where he sees… (Source: Kodansha, translated)

Source: AniList