Relationship
Single's Inferno 3's Lee Gwan-hee and Yoo Si-eun's journey as a couple
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'Single's Inferno 3' stars Lee Gwan-hee and Yoo Si-eun confirmed they are a real-life couple, alongside the show's original finale pairs. Lee Gwan-hee and Yoo Si-eun surprised fans by announcing in a joint social media post on July 29, 2026, that they have been dating since December 2025. Although they did not end up with each other during the show's finale, they stayed in touch as friends after filming wrapped and naturally developed a romantic relationship over time.
The couple revealed they have been dating since December 2025. Despite having very little romantic interaction during the filming of 'Single's Inferno 3,' which aired in late 2023 to early 2024, the couple managed to turn a reality show friendship into real-life love.
They dated privately for about eight months before announcing it. In an interview with 'The Korea Times,' Yoo Si-eun shared that she was initially scared to go public, but agreed because Gwan-hee was very eager and she felt a deep sense of faith and confidence in him.
Speculation about a possible marriage sparkled after Si-eun's younger sister, Yoo Eun-seo (Miss Korea 2025 winner), commented on their joint Instagram post calling Gwan-hee her "future brother-in-law".
