Kunoichi Torimonochō (Kunoichi Detective Story) is a Japanese-style adventure game. Take the role of Ran and travel around Edo, interact with a variety of colorful characters, play numerous minigames, and attempt to train Ran into a proper Kunoichi. There are multiple endings depending upon your choices and performance through the game.

Long ago, during the Edo period, those chosen to become ninja train in secrecy from youth, living in an isolated village to become a secret agent for the shogun. Here, a young girl is training to become such an agent; her name: Ran Sagajo. Along with her talking ninja squirrel companion Sasuke, she has begun a trip to Edo to continue her training.