Single's Inferno 3: Lee Gwan Hee & Yoo Si-Eun dating

Looks like love blossomed after the cameras stopped rolling for Single’s Inferno 3 stars Lee Gwan Hee and Yoo Si-Eun. According to South Korean publication The Chosun Daily, the pair have been dating since December 2025, after staying in touch as close friends following the Netflix dating show’s release. Although they did not form a couple during the series, their friendship reportedly grew into a romantic relationship over time. The news was confirmed by the couple themselves in a joint Instagram post on July 29. “Today, we’d like to share some good news about the two of us,” they wrote. “We’ve been quietly getting to know each other through the warm attention many of you have sent us, and now we’re here to express our sincere feelings directly.” They added that they plan to “cherish each other, support each other and nurture a beautiful love”, while thanking fans for their continued encouragement. Sports Chosun also published photos of the couple on an aquarium date, describing them as keeping their relationship relatively private while supporting one another behind the scenes. Lee, a professional basketball player for the Seoul Samsung Thunders, won over international audiences with his appearance on Single’s Inferno 3 and has since appeared on the Korean reality series Blood Game 3. Yoo, who was crowned Miss Korea Goodness 2022, also gained a strong following after appearing on the hit Netflix dating show.