Black Jack Gaiden: Midnight

Midnight is the story of a taxi driver named Shinya Mito (whose name is literally Japanese for "mid" and "night") and his various passengers, each of whom he helps in various ways. Shinya drives a taxi as a way to earn money for the treatment of a young woman named Mari, whose brain was injured sometime earlier as the result of an accident Shinya was responsible for causing. The taxi Shinya drives is equipped with a fifth wheel which makes the car more maneuverable under any kind of road conditions.

Volumes 354-359 of the Osamu Tezuka Complete Works