Kowaku no Toki: vol.1
Small detektive works in a fine detective bureau. Things are going badly. 24/7 and morning hangover - nothing at all unusual. However, every night the main character sees strange dreams about some unknown girl, she gets a strange request from a businessman - to investigate a certain area, the area with a mysterious mansion. And so our hero and his assistant Momono undertake the task. But neither he nor his assistant could imagine what they would find out.