Yon-goukan no Jiken

Building No. 4 is one of the houses gifted to the mistresses of a power family head. This place becomes a boarding house. One evening a self-proclaimed painter finds a strange corpse in the dressing room. A newspaper reporter who stays nearby vigorously starts collecting clues. The two of them are on their own since proprietor more interested in morning and evening meals than finding a murderer.

[From vndbreview]