Earlier this year, IU and Lee Jong Suk ended their relationship after four years of dating.
IU And Lee Jong Suk Have Broken Up
As one of the most recent Dispatch couples, many loved the couple together and were saddened by the break-up. The pair had a long history of working together, with Lee Jong Suk saying that she was “always part of his heart.”
IU and Lee Jong Suk
With reason given for the break-up, fans have been left with questions, that IU might have just answered.
Ahead of her full album, IU released a digital single album featuring two tracks, “Unknown Planet” and “Dear My Crazy Soulmate.”
| EDAM Entertainment
Following the release, fans took note of the lyrics for “Unknown Planet,” and believe that they may have been written about IU’s relationship ending.
The lyrics begin with a description of a first meeting and how love bloomed, before turning towards how things ended.
On an ordinary day, you suddenly opened the door and walked in.
Do you remember the moment our love began?
The words that faded away between our awkward laughter,
And that night that felt unusually short because we didn’t want it to end
I don’t think I’ll ever be able to forget it.
The song that was playing
When we shared our first kiss,
The nickname only you used to call me,
Even the ways we made up after our fights
Everything that made up our love.
I’ll leave it all here
And walk away,
Leaving behind our goodbye.
— “Unknown Planet” lyrics
The song ends with a note of regret over the potential future discussed, while IU says she will leave it all behind and say goodbye.
It’s not that I really miss you anymore,
And it’s not that I regret that our love has ended.
Still, the reason I’ve spent all this time lingering here
Surely can’t be written off with just one word
Like “waiting” or “regret.”
The conversations we had all through the night,
The laughter that slowly began to sound alike,
The streets I used to run down to meet you,
And the future we imagined together every day
Everything that made up our love.
I’ll leave it all behind here
And walk far away,
Leaving behind our goodbye.
— “Unknown Planet” lyrics
Many fans reading the lyrics have shared their emotional responses, while also reflecting on IU’s mature mindset.
Unknown Planet has got to be one of the most direct and vulnerable lyrics that IU has made. She laid it all out there of what happened to their relationship. It really hurts now knowing as a Uaena that they really were planning a future together. https://t.co/OYQraCKv8N pic.twitter.com/0aAHCgGMjk
— archive (@nini_iu) September 10, 2026
This hurts! 😭 I think this is one of the most straightforward and honest songs she’s ever written. She didn’t hide it. It’s so intimate, you can just feel and understand exactly where she was at emotionally when she wrote this 🤧#아이유 #IU#UnknownPlanet https://t.co/tQ3aAumnBB pic.twitter.com/6SfLRaPdYQ
— S//IU_UnknownPlanet (@iucamz) September 10, 2026
At least we knew even when her past love is not the end game.. She was so much in love, she was so happy that she dared to dream of a future with him, she didn’t regret the time they spent while being in love.. That even when it ended, she’s able to wrote a beautiful song about…
— 마음 🩵 (@akdmaeum) September 10, 2026
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