Kim Se-jeong will present an "all-time senior and junior duet" with Jang Hye-jin.

The spoiler image and track-list of Jang Hye-jin's 30th-anniversary album title song were released on Jellyfish's official SNS channel on November 16th and 17th, respectively.

First, the news that Kim Se-jeong will participate as a duet singer on the 30th anniversary of Jang Hye-jin's debut album 'RE: main' was revealed through a spoiler image and attracted a lot of the public attention. The beautiful and delicate vocals that Jang Hye-jin will present two people have a foreboding, raising expectations.

In addition, through the track-list released in a row, it has been revealed that Kim Se-jeong will work together through "Naegeuro," one of Jang Hye-jin's representative hits, raising questions.