Lunatic Circus is a Manga/Manhwa/Manhua in english language, manga series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

"Lunatic Circus" is a story about the circus called "Lunatic Circus", which is said to be the best in post WWII Japan, which has achieved an incredibly rapid economic growth. The star of the circus, Ryunosuke, and all the other trapeze artists, are the protagonists of this manga. This is the story of their dreams, their fears, their struggles and their hopes.