Joshidaisei Private

Released in 1983 by Nihon Falcom, this title is the company's only adult game and a rare artifact representing the dawn of the Bishoujo game genre. Players select from three characters and solve puzzles to reveal illustrations, a creative new approach for PC games of that era. The game features "15-puzzle" and Rubik's Cube-style mechanics, offering a simple yet challenging experience that tested players' skills at the time. Today, it serves as a valuable historical document illustrating the diversification of software in the early PC industry, long before the developer became famous for their blockbuster RPGs.

Players choose one of three college students—Miyuki, Yuko, or Kyoko—with the goal of completing illustrations that reveal their private moments. The game proceeds in stages where solving puzzles gradually uncovers hidden images. As players progress, the puzzles increase in difficulty and the illustrations reveal more, a design that reflects the emblematic style of the early adult gaming scene.