Hiroshi Nanjo is an active and tactful youth devoting more of his energies to his part time job than to studying for a college entrance exam. On the other hand, Bunpei Noro is an awkward fellow who once failed in a college entrance exam and is now studying hard for a second try. ‘Light and Shade of Youth’ depicts the friendship between these two young men of opposite characters, interlacing a cute waitress along the way.

When cabaret singer Lily writes Toraya about her illness, Tora-san rushes to Okinawa to be by her side.

Hiromi Go plays a high school student who needs a role model in his life badly. He's raised by his older sister played by Keiko Matsuzaka who is a hostess at a night club. She meets a man who becomes her boyfriend. He races in a off-road car rally professionally. The same man becomes Go's role model and teaches him sophisticated car driving techniques. One of the techniques taught is 'double clutch' ( Thus the movie's title Double Kuracchi ) to make gear transition smoothly between shifts. Hiromi Go was a big pop idol in Japan when this movie was created. Both Go and Matsuzaka still enjoys high celebrity status in Japan.