Season 1 of My Damn Business premiered on October 5, 2024.

Sales Team 2 receives notification of dissolution amidst the company’s management crisis. Left alone, Team Leader Han must wrap up business with partner companies that he has managed within three months. Yun, an assistant manager from the support team, is dispatched to Sales Team 2. With just the two of them in the empty office, Han can't help but notice Yun's aloof demeanor. A small incident leads to changes between the two.