Park Bo-young Calls Lee Kwang-soo Her Worst Friend

The Season 4 finale of SBS's Whenever Possible (틈만 나면,) was everything fans could have hoped for — and then some. When actors Lee Kwang-soo and Park Bo-young joined hosts Yoo Jae-suk and Yoo Yeon-seok on April 14, 2026, for an afternoon in the Guri area, the result was an hour of unfiltered warmth, playful chaos, and one devastating friendship verdict that had Korean variety fans talking long after the credits rolled.

Whenever Possible centers on a disarmingly simple premise: hosts Yoo Jae-suk and Yoo Yeon-seok drop in on ordinary people during their brief moments of free time, hoping to sprinkle a little joy into their day. Beneath that gentle concept, however, lies one of Korean variety television's sharpest comedic dynamics. The Season 4 finale arrived with an added layer of emotional weight — Lee Kwang-soo and Park Bo-young were the very first guests on Whenever Possible Season 1. Seeing them return to close out Season 4 felt, for longtime viewers, like a perfect circle.

The cast chemistry ran deep on multiple levels. Lee Kwang-soo and Yoo Jae-suk share decades of history as co-stars on SBS's iconic variety show Running Man. Park Bo-young and Yoo Yeon-seok had previously starred together in the beloved 2012 film A Werewolf Boy. And Lee Kwang-soo and Park Bo-young had most recently appeared alongside each other in the Disney+ original series Gold Land. When these four sit down together, the banter practically writes itself.

Yoo Jae-suk Calls Out the Han River Date

The moment Yoo Jae-suk spotted Lee Kwang-soo walking onto set, the teasing began. The Nation's MC wasted no time bringing up the talk of the internet — photographs that had gone viral in late March 2026, showing Lee Kwang-soo and his girlfriend, actress Lee Sun-bin, enjoying a relaxed Han River outing with their pet dog.

"Are you doing love marketing with Sun-bin? That's marketing your relationship, right?" Yoo Jae-suk quipped, sending the studio into immediate laughter.

Lee Kwang-soo, visibly caught off guard, pushed back without hesitation. "What marketing? It's just a natural part of daily life," he insisted. "We just took the dog for a walk. There is no marketing involved." When pressed further, he added: "It was just a natural, everyday outing. Nothing more."

The Han River date had generated an enormous response online. Social media was flooded with supportive messages, with fans writing comments like "It's so nice to see them enjoying something as simple as a picnic" and "I hope they stay happy for a long time — and even get married." The sighting reportedly drew over 25,000 reactions across various platforms, a testament to how beloved the couple has become.

Lee Kwang-soo and Lee Sun-bin's relationship stands as one of Korean entertainment's most enduring love stories. The two first met in 2016 on Running Man, where Lee Sun-bin openly stated that Lee Kwang-soo was her ideal type. They went public with their relationship in 2018, and have been together for nearly nine years, consistently winning over fans with their low-key but affectionate dynamic. For Yoo Jae-suk — who watched their early friendship blossom firsthand on Running Man — the chance to tease his longtime junior was clearly irresistible.

On set, however, Yoo Jae-suk wasn't quite finished. "I can still see the love written all over your face," he added, drawing delighted howls from everyone in the room.

Park Bo-young's Surprise Roommate Reveal

While Lee Kwang-soo fielded questions about his love life, Park Bo-young had some personal news of her own. The Strong Girl Bong-soon actress revealed that she's recently gained a new roommate — her closest friend from high school, who had relocated from Cheongju to Seoul for a new job.

"I told my friend to take her time finding a place," Park Bo-young explained. "We've been living together for a bit now. It's so nice." The warmth in her voice was unmistakable, and it immediately struck a chord with viewers watching at home.

The revelation painted a picture of Park Bo-young as someone who fiercely values friendship, keeping her closest relationships close even amid the demands of a high-profile acting career. She noted that one of the unexpected pleasures of the arrangement was cooking together — something she rarely did on her own. "I usually just order delivery," she admitted, laughing. "But since my friend moved in, I've actually been cooking a bit. It's different."

Park Bo-young also opened up about a more introspective topic: turning 40. Now in her late 30s, she confessed that the approaching milestone still felt surreal. "I can still clearly remember saying 'I'm in my twenties!' It's strange to think about," she said, shaking her head. "I think, 'I'm going to be forty?' — and it just doesn't compute." The moment drew knowing laughter from the cast and no small amount of relatability from viewers navigating the same milestone from their own living rooms.

The Worst Person She Knows

If Park Bo-young's update about her home life was heartwarming, her assessment of Lee Kwang-soo was decidedly the opposite — and became the episode's most talked-about moment.

During their afternoon in Guri, the four visited a couple who run a badminton academy and are certified masters of the game. After a lively round of competition in which Lee Kwang-soo emerged victorious, the winner's dessert prize became the source of a very swift controversy. Rather than share his prize with the group, Lee Kwang-soo stuffed the entire thing into his mouth in a single, gloriously theatrical move.

Park Bo-young's response was immediate and unequivocal: "You're the worst. Of everyone I know, you are the absolute worst."

The verdict, however, came with supporting evidence. Park Bo-young went on to document Lee Kwang-soo's more demanding qualities as a friend. "He tries to educate you," she said, with the dry delivery of someone who has been on the receiving end of said education many times. "He doesn't like it when you take too long to reply to his texts. You have to answer quickly. He watches and waits."

Lee Kwang-soo, for his part, appeared entirely unbothered — responding with the wide grin that has made him a variety show favorite for over a decade. Yoo Jae-suk, who has known Lee Kwang-soo longer than perhaps anyone in the industry, offered the perfect response: a long, slow, deeply understanding nod that required no words whatsoever.

Fans online quickly rallied to the moment, with many pointing out that the dynamic between Lee Kwang-soo and Park Bo-young — part exasperation, part obvious affection — is precisely what makes them such compelling pair on screen. "They bicker like actual siblings," one viewer wrote. "You can't fake that."

A Season That Ended Where It Began

As the episode moved toward its conclusion, the weight of the finale settled gently into the room. Yoo Jae-suk, taking stock of how quickly the season had passed, voiced what many viewers were feeling: "We started last fall and now it's spring." Yoo Yeon-seok, his co-host, chimed in with a half-joking request: "Can't we just keep going?"

The significance of Lee Kwang-soo and Park Bo-young's presence wasn't lost on anyone. Having opened Season 1 and returned to close Season 4, the two actors had unknowingly become the bookends of Whenever Possible's current era. Yoo Jae-suk acknowledged the symmetry with characteristic warmth, then offered the sign-off fans were hoping for: "See you next year."

Whenever Possible has become a genuine fixture in the SBS variety landscape, earning consistent praise for its ability to balance spontaneous laughter with moments of genuine human connection. The Season 4 finale — anchored by two of Korea's most beloved actors and the hosts they've known for years — delivered exactly that balance.

As for what comes next: Lee Kwang-soo and Park Bo-young's Disney+ series Gold Land gives fans another chance to watch their chemistry unfold in a scripted setting. And somewhere in Seoul, there's every chance Lee Kwang-soo is already texting someone — and quietly checking to see how long it takes them to reply.