Action, Adventure, Fantasy, Shounen, Webtoons

11-year-old Jung Si-woo never had any friends, because there was nothing interesting about him. He lived an average life as an average person in an average world. But suddenly, the earth faced a great change when Mysterious floating 'Sky Castles' appeared. The 'Sky Castles' granted some people wing and power, but unfortunately, Si-woo wasn't one of them.