In March 2025, a scandalous controversy erupted involving South Korean actor Kim Soo-hyun and the late actress Kim Sae-ron. The dispute centers around allegations of a prolonged romantic relationship that allegedly began when Kim Sae-ron was underage, a claim that has profoundly impacted the reputations of those involved and ignited discussions about celebrity culture and legal boundaries in South Korea. The controversy was initiated by the Garosero Research Institute, a YouTube channel run by Kim Se Ui, known for his investigative content.
They presented evidence suggesting that Kim Soo-hyun and Kim Sae-ron were involved in a secret relationship starting in 2015, when Kim Sae-ron was 15 years old, and that the relationship persisted for six years. This evidence included alleged diary entries from Kim Sae-ron and communications between the two, purportedly indicating a romantic involvement during her teenage years. ALSO READ| Kim Sae-ron’s alleged letter to Kim Soo-hyun confirms they ‘dated for 5-6 years’ amid underage dating controversy Further complicating matters, another YouTuber, Lee Jin Ho, claimed that Kim Sae-ron was coerced into a secret marriage and had undergone an abortion with another man just a month before her death.
These assertions were based on alleged recordings and communications linked to Kim Sae-ron. Though the authenticity of these materials have not been independently verified, Kim Sae-ron’s alleged husband has officially confirmed they were married. However, he denied any allegations of forced marriage and abuse.
Kim Soo Hyun cried and said: "If anyone thinks that choice was cowardly or selfish, I will accept all criticism. And I sincerely apologize to everyone who has always loved and cared for me." #KimSooHyun pic.
twitter.com/WeguwBJA2p — Bee🐝 (@Beevl__) March 31, 2025 Kim Soo-hyun and his agency, Gold Medalist, have also vehemently denied all allegations. They refute claims of a romantic relationship with Kim Sae-ron during her underage years, stating that any relationship commenced only after she reached the legal age of consent.
The agency has labeled the accusations as "baseless" and "malicious" and has also pursued legal action against those disseminating false information, including Garosero Research Institute and Kim Sae-ron’s family. In the latest development, YouTuber Lee Jin-ho has released yet another video alleging he has “decisive evidence” to prove that Kim Soo-hyun did not date Kim Sae-ron when she was a minor. “First, I received a tip that Kim Sae-ron was actually involved with another celebrity, and not Kim Soo-hyun, in 2016,” said Lee Jin-ho, asserting that the tip came from a credible source.
He also suggested, “Kim Soo-hyun was in a romantic relationship with someone else during that period. This relationship lasted from 2016 until the end of his military service in 2019, lasting for nearly three years.” According to Lee Jin-ho, Kim Soo-hyun kept his relationship a secret affair, but apparently Kim Sae-ron knew that he was committed.
“During Kim Soo-hyun’s long vacation off the military base during his enlistment, Kim Sae-ron visited the house where his family lived, and they ordered delivery food together. That is about all there is to the friendship between the two. At that time, Kim Sae-ron was also aware that Kim Soo-hyun had been in a long-term relationship.
It is unclear what feelings Kim Sae-ron had toward Kim Soo-hyun at the time, but it is confirmed that she actively reached out to him,” claimed the YouTuber, insisting Kim Soo-hyun maintained considerable distance from Kim Sae-ron. ALSO READ| Kim Sae-ron’s husband refutes alleged assault rumours, claims she was never pregnant “To summarize these events: At the time, Kim Soo-hyun had been in a long-term relationship with a partner. Kim Sae-ron was aware of this, and during his long break, she only visited the house where the family lived once,” said the YouTuber.
To back his statement, he also released a new video of Kim Sae-ron from an apparent date with another man she was dating in 2016. A few glimpses capture Kim Sae-ron walking hand-in-hand with the unknown man; meanwhile, in another moment, she likely kisses the person publicly. The truth is finally coming out! The intimate video of Kim Sae Ron with her actual boyfriend from 2019 has been revealed.
Watch the full video on Lee Jin Ho’s channel here: https://t.co/bYoXmlIgk2 #WeStandwithKimSooHyun pic.twitter.
com/6Yc36YTFpm — Nobodysavesme (@nobodysavesme99) April 9, 2025 “So, is it possible that Kim Soo-hyun and Kim Sae-ron were both involved with each other and in other relationships at the same time? I focused on investigating this suspicion. Upon verification, this turned out to be untrue. The reason is that Kim Soo-hyun was released from his military duty on July 1, 2019.
After dating for about three years, he ended his relationship with his partner as his military service came to an end. Kim Soo-hyun stated that he was in a relationship with Kim Sae-ron from the summer of 2019 to the fall of 2020. Note that Kim Sae-ron also had another partner leading up to this time.
This is confirmed by clear evidence,” said the YouTuber. He continued, “Kim Sae-ron has a highly sociable personality and dated various people from high school to university. Sometimes, her affectionate displays, such as kissing her partner in public, were captured.
The material I’m revealing today includes a video of Kim Sae-ron showing affection to her partner in Seoul, between Noryangjin Station and Eonju Station, in 2019. I seriously debated whether to release this video. However, if the truth about this issue isn’t revealed, it will only lead to many unfair accusations and speculations.
So, I made the decision to release it.” The YouTuber ended the video by reiterating that Kim Sae-ron’s claims of having dated Kim Soo-hyun for six years through her teenage years are false—and bidding Kim Se Ui of Garosero Research Institute good luck on his massive lawsuit filed by the actor. “The materials I am revealing today are not the end.
I will continue to release all the materials I have gathered and have them judged by the viewers. As for Kim Se Ui, the end is near. I hope you resolve the legal issues and the civil case worth KRW 12.
0 billion (about $8.07 million USD) well. The truth, though slow, will definitely be revealed.
Thank you,” said YouTuber Lee Jin-ho. As of April 2025, the legal proceedings will soon commence, with both Kim Soo-hyun's agency and Kim Sae-ron's family preparing to present their respective evidence. The case has not only affected the personal lives of those involved but has also had a significant impact on their professional engagements.
The public's perception remains divided, with some supporting Kim Soo-hyun and others expressing sympathy for Kim Sae-ron's family. ALSO READ| Kim Soo-hyun tears up bitterly denying allegations of underage dating; Enraged netizens call it ‘fake crying’.
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Shocking video catches Kim Sae-ron involved in alleged PDA with another man, not Kim Soo-hyun, in 2016

It is suggested that Kim Soo-hyun was dating another person between 2016 to 2019.