NCT 127 appeared on KBS2’s ‘The Seasons – Sung Si-kyung’s Eardrum Boyfriend’ and performed on stage to commemorate their 10th anniversary of debut. We looked back on the team's musical journey by performing new and representative songs live. Jaehyun, who completed his military service, gave practical advice to Jungwoo, who is currently serving, and the members showed their strong teamwork through video messages and duet performances.