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Korean actress-singer Kim Sejeong releases 'Solar System'

Published Dec 18, 2025 09:57 am
Kim Sejeong (Jellyfish Entertainment)
Kim Sejeong (Jellyfish Entertainment)

Korean actress and singer Kim Sejeong released her first single album “Solar System” on Dec. 17. 

It is a remake of "Solar System (태양계)” by Sung Si Kyung, which was originally released in 2011. This is Kim Sejeong’s first music release since her first full album, “Door,” in 2023. 

“Since I’m releasing a new song after a while, I worked very hard on this single in hopes of breaking the limit of my vocal skills! I hope many people could resonate with it” 

Kim Sejeong (Jellyfish Entertainment)
Kim Sejeong (Jellyfish Entertainment)
Kim Sejeong (Jellyfish Entertainment)
Kim Sejeong (Jellyfish Entertainment)
Kim Sejeong (Jellyfish Entertainment)
Kim Sejeong (Jellyfish Entertainment)
Kim Sejeong (Jellyfish Entertainment)
Kim Sejeong (Jellyfish Entertainment)

Kim Sejeong worked with singer-songwriter Jukjae on the arrangement for the remake. 

“While attempting not to ruin the atmosphere of the original song, we tried to reinterpret the track’s signature sorrow to that of the monologue of an actor who has just begun telling their story,” he said. 

He added, “How deep the meaning behind the lyrics and the breaths between the words still remains a mystery, and as such, the production process was a constant back-and-forth of ‘Is this the right tone? Is this how we progress here?’ Taking in how we attempted to express the sounds of the glistening planets with acoustic instruments, we hope you can feel as if you’re inhaling and exhaling in sync with Sejeong’s breaths.” 

Before the release of “Solar System,” Kim Sejeong starred in the K-drama “Moon River.” 

“Solar System” marks the beginning of her 2026 promotions starting with her upcoming fan concert tour “Tenth Letter,” which will kick off in Seoul on Jan. 10, followed by performances in Taipei, Melbourne, Sydney, Manila, Hong Kong, Kuala Lumpur, and Yokohama.

Kim Sejeong is known for the dramas “Business Proposal” and “The Uncanny Counter.” She debuted as a member of K-pop girl group I.O.I. and later joined Gugudan. 

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