The World On arirang

This is a song written by singer-songwriter Lee Jin-ah specifically for Yoo Seon-ho. The prominent piano melody in the intro will evoke the sweetness and freshness of the spring season. It tells a story of a young man who wants to walk with his love on a warm spring day.

This is the first song written by Heyne that describes a sleepless night. It’s a ballad song in bossa nova style that has a dreamy melody and a pleasant acoustic guitar sound.

This is an easy-listening song in bossa nova style where Sunny 2morrow’s crystal clear vocals and Hyene’s unique vocals blend together beautifully. It describes a lone trip, and as eating and drinking alone has become popular in Korea, many listeners will be able to relate to the song.

This is a song in urban hip hop style with the members' rap and vocals blending perfectly with the heavy bass riff. It conveys a message that genuine communication and empathy are needed in today's society. NCT U also presents powerful music and performance that only they are capable of.