There is no PSP cover art on file for this game
Yuna Fubuki is the newest intern at Arion Medical Center, a prestigious and advanced medical facility. However, Yuna has a secret: she's actually a highly-advanced android built to be indistinguishable from a real human. She has come to AMC along with her creator, robotics prodigy Souji Saegusa, to put her abilities to the test. She must train and work as a nurse for three months without anyone discovering that she is not actually human. However, AMC holds its own share of dark secrets, and things aren't going to be simple for Yuna.
Medical 91 is a Japanese-style visual novel. The majority of the game is spent reading and listening to the story unfold, though Yuna will often be given choices that will cause the story to branch in varying ways. At many points, it is possible to move freely throughout the hospital to speak with the other characters on numerous subjects, with the story only proceeding once the proper conversations have taken place. There are also certain segments where the player must choose locations to escape pursuit, as well as avoid capture in a timing-based minigame.