This case report is based on the clear aligner treatment of an adult patient who presented with moderate crowding and an unpleasant smile. Crowding was treated with arch expansion and interproximal reduction. A total of 28 sets of clear aligners were delivered, with a wear time of 22 hours per day for 10 days. The treatment duration was 10 months. Thus, the case study underscores the reliability of orthodontic treatment with clear aligners for addressing moderate crowding. The discreet nature of these aligners not only enhances periodontal health but also increases patient acceptance.