But now, a potential public sighting of the K-drama heartthrob at the K-pop idol's Seoul concert has ignited rounds of uncontained excitement. The couple's friends-to-lovers story pulls a page out of K-drama episodes. However, last month, a viral online post alleging that the golden pair had broken up became a cause for many broken hearts. Lee Jong Suk and IU's conspicuous public absence further fuelled South Korean journalists' "back-handed" digs at the rumoured breakup. However, the beloved duo has seemingly shut down that bitter insinuation about them going their separate ways. Amid IU's ongoing encore concert shows for the "2024 IU HEREH World Tour Concert Encore: The Winning" series, a mystery appearance has sparked a frenzy online. Fans believe the Pinocchio actor was also in attendance at the Seoul World Cup Stadium show on Saturday, September 21. Lee Jong Suk spotted at IU's Seoul concert? Numerous social media posts shared videos from the event, with a man wearing a black bucket hat and his face masked up at the centre of each post. "Streets are saying it's Lee Jong Suk," tweeted a fan on X, formerly Twitter. The W star has always been known for being a "supportive" BF and has often been spotted at IU's concerts in the South Korean capital alongside members of his team. One of the most recent pictures from the Saturday concert captured the actor enjoying the show from afar. He was also snapped beside a familiar staff member, which only fanned the fire of speculations lit by eagle-eyed fans.