Detective Sunny and the Flower Boy's Knife

The year is 19XX. The kind of 19XX that has typewriters and fog and drinking in the office. Hero is off working on a secret case, you have been given the role of substitute detective. His detective agency isn't very popular, so you spend most of your time just sitting around and chatting with Basil, your assistant. Until one day, a routine case turns out to be more serious than anyone could have imagined. With Hero nowhere to be found, it's up to you to solve it.

[from itch.io]