Route 20

Mangaka: Yoshiyuki Sadamoto
Genre: shounen, one-shot

Synopsis: In the future, everybody lives inside a giant dome where temperature, the weather, humidity, etc. are controlled. No one is allowed to get out lest the polluted air of the outside world kill you. For Utsuo, his only thrill is riding on his scooter, and feeling the wind blow on his face.

Comments: Route 20, with its existentialist philosophy, is a pretty serious story. There's also a bit of action (wheee! a motorcycle chase) and a hint of romance in it but for the most part, we get a glimpse of the main character's introspection.

Scanlator: Mangascreener (all 5 chapters are done)