New boy group HIGH4 is making a lasting impression through their single "Not Spring, Love, or Cherry Blossoms".

The single was released on April 8th, and it has remained in the top 10 lists of multiple online music charts since, including Olleh Music, Bugs, Naver Music, and MelOn.

One of the reasons for the song's success is the help of superstar IU. IU and HIGH4 member Kim Sung Goo have been revealed to be close friends. IU took care of her longtime friend by writing the lyrics for "Not Spring, Love, or Cherry Blossoms" and even featured in the song and the music video.

IU's voice in the song is very clear and perhaps a welcome surprise to fans who are waiting for IU's next single. The duet between HIGH4 and IU is one of the strong selling points for the song.

HIGH4 revealed that they hoped that the song would be synonymous with spring like Busker Busker's "Cherry Blossom Ending", which rises to the top of the charts every Spring since its release.

The song is about a single person who wants to enjoy Spring but is bothered by the fact that he is a single amidst a sea of couples. The song has a catchy hook and a modern acoustic sound that is pleasing to the ear.