A blunt but kind big brother and the bright and innocent Ayoung live in apartment building 201, suite number 202. This is the story of the everyday life of these cute siblings and their unpredictable neighbors!
I've seen this coined, "the korean Yotsubato! ", and while I've never consistently read Yotsubato!, it certainly has that feeling =03. I don't feel that Ayoung is as naive as Yotsuba is, but her being "knowledgeable" about things probably adds to the humor rather than takes from it.