Birdy the Mighty

Tsutomu, a perfectly average high school student, finds himself in the midst of a police chase when he stumbles upon a high-speed pursuit. Caught in the crossfire, the boy is severely injured, but his life is saved by Birdy, a young interplanetary police agent who joins her consciousness with his, essentially merging their minds. As a result, Tsutomu and Birdy share a body, forcing them to navigate their drastically different lives and personalities as they work together to capture criminals and save lives.