On October 27, NCT/WayV member Ten released his SM Station solo single "Birthday." After its release, the song entered iTunes charts in various countries worldwide.

First, "Birthday" debuted at No. 3 on the worldwide iTunes song chart and landed at No. 19 on the European iTunes song chart.

Furthermore, "Birthday" hit No. 1 on iTunes 'Top Songs' chart in a total of 13 countries, including Brazil, Chile, Saudi Arabia, Indonesia, Malaysia, Thailand, Israel, the Philippines, Colombia, Vietnam, Kazakhstan, Laos, and Costa Rica.

"Birthday" is a powerful R&B dance song with minimal drum repetition, marimba sounds, and dynamic drops in the bridge section. With romantic English lyrics and Ten's delicate vocals, it creates a dreamy atmosphere.