Chichi Ninja Revolution: Kanojo-tachi o Chōkyō Seyo

Chichi Ninja Revolution: Kanojo-tachi o Chōkyō Seyo is a Japanese erotic visual novel and the sequel to Chichi Ninja: Matenrō e Chichi Bomber. Both games are set in a world where voluptuous kunoichi remain active in modern Japan, using sexual techniques involving their breasts and buttocks to defeat their enemies.

In this sequel, the player takes on the role of a civil servant who is transferred to a department inside Japan's Ministry of Foreign Affairs, where he partakes in training to reverse the brainwashing of kunoichi who have previously been brainwashed by their enemies. His job gets more interesting when he learns that his cousin, Akira Mizuno, is one of these ninjas who have been brainwashed by the enemy, and that the best way to reverse brainwashing is through sex.