Read manga I Log In Alone. 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 wings and powers, but unfortunately, Si-woo wasn t one of them. Ngl, this is literally solo leveling XD But, if you want to enjoy a slightly different story with the same premise, this is for you!