Ki Hee-hyun and Lee Sang-yoon's Public Relationship: From the June Osaka Video to Their September Hand-Holding Update
Former DIA member Ki Hee-hyun and model Lee Sang-yoon publicly confirmed their relationship themselves in June 2026 and remain openly in a relationship as of September. Photos posted by Ki Hee-hyun in September 15 included an image of her holding hands with Lee Sang-yoon inside a vehicle.
When Did Their Relationship Become Public?
Ki Hee-hyun and Lee Sang-yoon's relationship first became publicly known in 2026-06-23.
At the time, both shared videos of themselves together in Osaka, Japan, on their respective social media accounts. The footage showed the couple walking down the street holding hands before waving toward a CCTV camera.
Ki Hee-hyun posted a message and video about the memories she had made in Osaka, and Lee Sang-yoon also responded to the post. Starting the following day, June 24, news of their relationship was reported by multiple media outlets.
Therefore, the September photos did not mark the first public revelation of their relationship. Rather, the couple, who had already been openly dating since June, shared another glimpse of their recent time together on social media.
What Photos Were Shared in September 15?
In September 15, Ki Hee-hyun uploaded several photos showing what she had been up to recently on her social media account.
Among them was a photo of her holding hands with her boyfriend, Lee Sang-yoon, inside a vehicle. The latest reports available as of the morning of September 16 also described the photo as an update on the couple's public relationship.
While the couple directly revealed their relationship through their Osaka travel video in June, this latest post was not a separate announcement of their relationship but another glimpse into their everyday lives as a couple who continue to date openly.
Who Are Ki Hee-hyun and Lee Sang-yoon?
Ki Hee-hyun debuted as a member of the girl group DIA in 2015 and also appeared on Mnet's 'Produce 101' in 2016. Since DIA ended its group activities, she has continued working in broadcasting and as an influencer, among other pursuits.
Lee Sang-yoon works as a model and gained recognition after appearing on Channel A's dating reality show 'Heart Pairing' in 2025.
An important point when examining their relationship is that it did not begin as an unconfirmed dating rumor based on speculation. In June 23, the two personally shared a video of themselves together on social media and have continued to share moments together since then.
As of the morning of 2026-09-16, the latest confirmed development was not a change in their relationship status, such as marriage or engagement. Rather, it was that the couple remained openly in a relationship and had recently shared another glimpse of their everyday lives together.
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