IU recently shared her personal thoughts on love and relationships during a behind-the-scenes conversation with the cast of Perfect Crown, and fans believe her comments may explain why she rarely speaks publicly about her relationship with Lee Jong Suk.

The discussion was featured in a video uploaded to IU’s official YouTube channel on the 23rd under the title “21st Century Project ‘WanSeong.’” The video brought together the main cast members of the drama, including Byeon Woo Seok, Yoo Soo Bin, and Lee Yeon, as they shared stories from filming and reflected on their growing friendship throughout production.

The cast displayed a relaxed and playful atmosphere while discussing memorable filming moments. Byeon Woo Seok spoke about the difficulty of maintaining his character’s tone during certain emotional scenes, explaining that even a small mistake could disrupt the character completely. He recalled how the cast worked together to improvise and refine scenes naturally during filming.

One particular conversation caught fans’ attention when Yoo Soo Bin jokingly commented that IU and Byeon Woo Seok had become much closer as filming progressed, saying their affection and chemistry had clearly grown stronger over time. Lee Yeon then teased the pair by joking that their “initial love” must have been tiny at first.

IU responded with a surprisingly personal reflection about relationships, saying, “When you truly love someone, you don’t really talk about it. It’s just there deep in your heart.”

The comment quickly went viral among fans online, many interpreting it as insight into IU’s famously private relationship with Lee Jong Suk. Although the couple confirmed they were dating publicly in 2022, both stars have largely kept their relationship away from the spotlight and rarely mention each other in interviews or public appearances.

Fans praised IU’s perspective as mature and sincere, with many saying her words reflected the quiet and stable image the couple has maintained since going public.

Meanwhile, Byeon Woo Seok playfully disagreed with IU’s approach during the conversation, saying that openly expressing affection is important these days. He jokingly shouted “I love you” multiple times toward Yoo Soo Bin, making the rest of the cast burst into laughter and adding to the lighthearted mood of the video.

IU and Lee Jong Suk first reportedly became close after working together on Inkigayo in 2012. After years of friendship, news of their relationship became public at the end of 2022, drawing major attention from fans and Korean media alike.

Since then, the couple has often been described as one of the entertainment industry’s most low-key celebrity relationships, with both stars remaining heavily focused on their individual careers while quietly supporting one another behind the scenes.