This is the lead track of Apink's eighth mini album, "PERCENT." It's a dreamy dance song with an electronic sound that describes a woman who plans to wait for the one, without making compromises due to loneliness. They used "%%," which is used to express, "Eung Eung (Yes, Yes)."

This is the title track of WINNER's single record, "MILLIONS." This is a song that's like a Christmas gift for a couple whispering about love. It has an emotional melody and heartwarming lyrics, and the rhythmic whistling sound in the chorus blends well with the bouncy kick.

This is the title track of BoA's new single record. It's an urban R&B hip hop dance song with a guitar sound in Latin music style and an addictive synth sound. BoA personally wrote the lyrics, which describe a woman who is in agony because of her obsessive and controlling boyfriend.

This is the lead track of Kim Sung Kyu's first studio album, "10 Stories." It's an alternative pop song with a fresh yet plaintive sound, where Kim Sung Kyu's calm and clear vocals stand out. The piano melody in the first half sets the overall mood of the song.