Cinderella Boy (Japanese: シンデレラボーイ, Hepburn: Shinderera Bōi) is a one-shot manga created by Monkey Punch.
The plot follows the adventures of impoverished private detective Ranma Hinamatsuri and his thrill-seeking rich girl partner Rella "Cindy" Shirayuki in a futuristic city named "Kirin Town".
Kirin Town is a lawless European city-state with its own currency with the name of the city being a pun on the English word for "killing".
The two are badly injured when they stumble across an organised crime operation and are put back together into the same body by a mysterious doctor.
Neither is aware of any actions or situations their partner is involved in, completely losing consciousness until twenty-four hours later, when the change comes around to them again.