It is a comedy drama depicting the company life with us. Flatulence, booger, sexual harassment, but tears are fragile! ?? A story of cute uncles who are laughing and relaxing, filled with uncle's "Aruaru". Rookie OL Kana, who was longing for Marunouchi OL, joined "Bisui Shoji", a wholesale company of small water purifiers of Shimomaruko, which is different from "Maru". The employees of Mimizu Shoji were uncle, except Kana! Kana, who was shocked by the characters of the uncles who were too intense and the many rare behaviors, began to keep a "Uncle Observation Diary."