Shadow Hunter

About
Shadow Hunter is an ADV game developed by Champion Soft.

Gameplay
This is an ADV title which is controlled by just a menu. Doing things might make other options pop up.

Choosing the wrong option will result in a game over though. So watch it.

Story
A famous writer announces her engagement and starts to receive threats and get blackmailed. The main character is a detective tasked with identifying the stalker. As the investigation proceeds, a murder occurs.

Walkthrough (Japanese)
The guide itself can help you complete the game, at times it reads more like pointers. The game's menus are mostly in Katakana, so if you don't read Japanese make sure to convert it.

The guide is from ymurakami, however I couldn't not confirm it.