"Pocket-sized people? What?! No way!" Hye-geong, an 18-year-old girl who studied in the field of science, discovers a new living creature which they are called... Pocket-sized Humans. She accidently met Taeyong, Jaehyun and Yuta while she is doing her recent reseach at home. Lots of chaos happen and Hye-geong gets annoyed easily ever since the trio pocket-sized humans come in her life. Read this to know the full story!