A former high school teacher named Arai, who harbors a fear of heights, starts a new job at a building cleaning company where his primary duty is washing the windows of skyscrapers from an aerial work platform. The manga is a serialization of Gaku Tanigaki's earlier one-shot, Madofuki Gyaru no Takami-san.

The person assigned to train him is his younger co-worker, Takami, who is nevertheless his senior on the job. The narrative follows this unlikely pair as Arai navigates the perilous and vertigo-inducing challenges of high-rise window cleaning. While the premise focuses on their professional life, the story is framed as a romantic comedy, with Arai frequently questioning whether the fast beating of his heart is due to the terrifying heights or the fact that he is working closely with his cute, gyaru senior.