The new office employee, Koga Nana, struggles with her job performance and frequently feels discouraged due to her constant mistakes. Despite this, she perseveres in her efforts thanks to Shibano-kaichou's encouragement. During a dinner outing, Shibano proves to have a low tolerance for alcohol and becomes inebriated after just one beer. As a result, Nana must bring him back to her home. What events will unfold from here?