IU Releases the Digital Single 'Unknown Planet', Writing the Words to Both Title Tracks
IU released the digital single 'Unknown Planet' at 6pm KST on 10 September 2026. It carries two title tracks — 'Unknown Planet' and 'Dear my crazy soulmate' — and she wrote the words to both. Herald Muse reported that 'Unknown Planet' was number one on Melon HOT100 and Genie TOP200 on the day of release.
What happened
IU released the digital single ‘Unknown Planet’ (이 별로부터) at 6pm KST on 10 September 2026. The record carries two songs — ‘Unknown Planet’, which shares its name, and ‘Dear my crazy soulmate’ — and the album information on Bugs marks both of them as title tracks. Economy Queen reported that IU wrote the words to both. IU’s official YouTube channel, IU Official, gives the song’s Latin form as Unknown Planet.
According to the same album information, ‘Unknown Planet’ was composed by 구름 (Gureum) and SUMIN and arranged by 구름, with IU and SUMIN on backing vocals. ‘Dear my crazy soulmate’ was composed by Maia Wright, Amanda Cy, Hannes Roovers and Isac Hördegård, and arranged by Medium. The record runs six minutes and 21 seconds; Kakao Entertainment distributes it and EDAM Entertainment is the label.
Why is it trending?
Herald Muse reported that on the day of release ‘Unknown Planet’ was number one on Melon HOT100 (the 30-day and 100-day charts), on Genie TOP200 and on the Bugs realtime chart, and number two on Melon TOP100. ‘Dear my crazy soulmate’ was number two on Melon HOT100 and the Bugs realtime chart the same day, and number three on Genie TOP200.
The same outlet reported that, as of 7am on 11 September, ‘Unknown Planet’ was number one on the iTunes top songs charts in Singapore and Taiwan and number two in Hong Kong, the Philippines and Sri Lanka, entering 16 country and territory charts in all. ‘Dear my crazy soulmate’ entered nine, among them a number one in Sri Lanka.
What you need to know
- ‘Unknown Planet’ is a digital single IU released at 6pm KST on 10 September 2026, and a pre-release from a sixth full-length album still to come.
- ‘Unknown Planet’ and ‘Dear my crazy soulmate’ are both title tracks, and IU wrote the words to both.
- Economy Queen reported that her agency, EDAM Entertainment, posted the tracklist video to IU’s official social accounts at midnight on 7 September.
- The music video for ‘Dear my crazy soulmate’ arrived with the record on 10 September, and the one for ‘Unknown Planet’ is due at midnight on 16 September.
- It is her first new song since ‘Bye, Summer’ in September 2025.
Profiles
Artists
IU아이유
IU is a singer and actress under EDAM Entertainment. She played Seong Hui-ju in MBC/Disney+'s Perfect Crown (2026) after Netflix's When Life Gives You Tangerines, which won best drama at the 2025 Baeksang Arts Awards.
- Position
- Singer-songwriter
- Agency
- EDAM Entertainment
- Debut
- 18 September 2008
Sources
Claims in this story link to official or primary sources.
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Related
이 별로부터 (Unknown Planet)
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