Ali will release his new digital single "Day and Night" through various online music sites at noon on Saturday.

Day and Night is a song about true love that makes my life shine and learn the world, not love that makes me anxious to have. So far, Ali's songs have been exploding from the inside to the outside, while the new song "Day and Night" contains emotions that permeate inside and build up.

In particular, the new song was created as a collaboration between the two, composer Kim Hyung-suk, the "Hit Song Maker" and lyricist Yang Jae-sun, the person with the "Emotional Craftsmanship," who created many beloved hit ballad songs of all ages, including Shin Seung-hoon's "I Believe" and Sung Si-kyung's "The Way to Me."