They say the death of Kim Seong-jae from Deux was the catalyst for Lula's "3!4!"

Lee Hyun-do weeping over the death of his friend Kim Seong-jae…
However, as suspicions arose regarding death due to drug side effects,
many celebrities were reluctant to visit his funeral.
But it is said that the members of Lula stayed by his side at the funeral for three days.
Lee Hyun-do was deeply moved by this,
and for Lula, who was struggling due to plagiarism allegations,
he poured his heart and soul into creating a song filled with hope.
And that song was "3!4!"…