「ルナティック・サーカス」は、高度経済成長を遂げた戦後の日本で、日本一と言われるサーカス団「ルナティック・サーカス」を描く物語。"Lunatic Circus" is a story about the circus group, Lunatic Circus, which is said to be the best in Japan in post-war Japan, which has achieved rapid economic growth. The signboard star of this circus group, Ryunosuke, his friends, and the domineering group leaders, who are touted as "lightning flight boys", appear.