One night, Kaede Sato accidentally locks herself out in the corridor of her workplace after staying late. Her secret crush and senior coworker, Daisuke Shioya, happens to pass by and rescues her. When a sudden downpour leaves them soaked, Shioya offers to let her stay the night at his apartment to wait out the storm. The situation becomes complicated when Shioya’s roommate unexpectedly returns home early. To avoid being discovered, Kaede and Shioya hide together in a cramped closet, where the close proximity leads to Shioya’s lips touching Kaede’s chest. To Kaede’s shock, the roommate is revealed to be Satoru Mizoguchi, her direct superior from work, who is known for pressuring her with heavy overtime.

Despite his cold and undeniably handsome demeanor, Shioya is a popular ace in the IT department who has shown little interest in romance until now. However, he finds himself increasingly drawn to the clumsy and love-inexperienced Kaede. Mizoguchi quickly discovers the secret between the two colleagues, adding further tension. Unbeknownst to Kaede, Mizoguchi harbors a hidden crush on her, which transforms the situation into an unexpected love triangle between the three office workers. The story follows the romantic and physical tension between the main characters as they attempt to conceal their feelings and encounters from one another, balancing workplace drama, secret crushes, and passionate confrontations. The manga is a josei romance set primarily within a modern Japanese corporate office and the shared apartment of Shioya and Mizoguchi. Key narrative arcs include the initial accidental locking-out incident and the subsequent hiding in the closet, the development of the secretive love triangle as Mizoguchi becomes involved, and the progression of the budding relationship between Kaede and the aloof Shioya as they navigate the risks of office romance.