This case report discusses the clear aligner treatment of an adult patient with Class II Division I malocclusion, managed using a non-extraction approach that combined arch expansion and interproximal reduction. A total of 28 upper aligners and 24 lower aligners were provided, each to be worn for 22 hours daily over a 10-day period. The entire treatment spanned 10 months. This case highlights the effectiveness of clear aligners in treating Class II malocclusion. The discreet design of the aligners promotes better periodontal health and enhances patient acceptance, increasing the likelihood of compliance and contributing to improved treatment outcomes.