Ms. Detective - File #1: Iwami Ginzan Satsujin Jiken

Chisato Higari is a detective to receive a request to find client's missing father. You get to know that father is in Omori but when you get there there is a news report about his death and at the same time your client disappears. Is the corpse floating in the sea of Japan truly client's father? Where did the client disappear?

[From vndbreview]