On the October 14th episode of KBS2's variety show 'Mr. House Husband,' special guest Lee Na-kyung from fromis_9 joined the show, featuring Park Seo-jin's sibling diet story and Eun Ji-won and Moon Hee-jun's project to find a bride for Ji Sang-ryeol.
During the opening, Lee Na-kyung shyly explained her title as the 'No. 1 idol disliked by plastic surgeons' by saying, 'I haven't had any plastic surgery or procedures.' Park Seo-jin humorously remarked, 'Are you really all-natural? You're the complete opposite of me. I'm all about plastic surgery,' bringing laughter to the set.
In Ji Sang-ryeol's daily VCR segment, legendary idols and eternal rivals Eun Ji-won of Sechs Kies and Moon Hee-jun of H.O.T. appeared together, drawing attention. Eun Ji-won playfully teased his friend Moon Hee-jun, now a father of two, saying, 'When you first said you were getting married, I thought you'd end up like me.' He added, 'I didn't expect you to be so family-oriented. I thought you'd be more individualistic like me.' Moon Hee-jun acknowledged the positive changes after marriage, saying, 'I was like that before marriage too.' He then asked Eun Ji-won about his plans for a second child, to which Eun Ji-won replied, 'There is a deadline,' sparking curiosity.
Eun Ji-won announced his remarriage to a stylist nine years his junior in June last year and held a private wedding in October with only close family and friends.
In the following VCR, Park Seo-jin and his sister Hyo-jung embarked on a boxing diet with mentors Kim Bo-sung and Kim Yong-myung. Before starting the diet, Kim Bo-sung emphasized, 'Dieting is a promise to oneself,' conducting a lesson on loyalty. Hyo-jung revealed, 'My brother lacks loyalty in love because he's never dated,' prompting Kim Bo-sung and Kim Yong-myung to confirm, 'Have you really never been in love in 32 years?'
Kim Bo-sung asked if Park Seo-jin had high standards, to which he surprisingly named actress Park Bo-young and comedian Kim Shin-young as his ideal types. Hyo-jung also mentioned Lee Do-hyun and Park Bo-gum as her ideal types, catching attention.
In the studio, Ji Sang-ryeol shared a heartwarming story about Park Bo-gum, saying, 'At the 2025 Entertainment Awards, while everyone was waiting to take a photo with Park Bo-gum, he approached me first and asked, 'Can I take a picture with you?' He has an energy that makes people feel good.'
Kim Bo-sung also praised Park Bo-gum's character, saying, 'I might be working on a movie with Park Bo-gum soon,' exciting the siblings. Park Seo-jin, more thrilled than Hyo-jung, encouraged her, 'If you lose weight, ask to meet him,' boosting her diet motivation.
Meanwhile, Kim Yong-myung asked Kim Bo-sung about rumors of him fighting 13 against 1. Kim Bo-sung confirmed, 'I used to be a fighter in an organization. There were many fights against multiple opponents.' He also shared a story about accidentally hitting himself with nunchucks on a variety show with his sons, leading to 25 stitches without anesthesia, shocking everyone.
After hearing the mentor's extraordinary tales, Park Seo-jin and Hyo-jung warmed up with jump ropes. Hyo-jung effortlessly warmed up with a steady posture, while Park Seo-jin quickly tired, showcasing his lack of stamina. Park Seo-jin's playful boxing steps and cute punches even led mentor Kim Bo-sung to declare, 'Seo-jin shouldn't fight. He'll just get hit,' causing laughter.
As the outcome seemed predictable, Park Seo-jin and Hyo-jung engaged in a sparring match. Park Seo-jin was repeatedly hit by Hyo-jung, as expected. However, he unexpectedly landed a valid hit, gaining momentum and surprising everyone. Hyo-jung, provoked, retaliated with powerful punches, turning the sparring into a brawl. Amidst the emotional punches, Park Seo-jin surrendered, and Hyo-jung celebrated her victory.
The second round was a verbal 'sparring' match, with the studio anticipating, 'Seo-jin is strong with words. He can win.' Park Seo-jin started with ineffective nagging, while Hyo-jung delivered a strong blow, saying, 'Honestly, without me, you wouldn't have any airtime, right?' Park Seo-jin acknowledged Hyo-jung's contribution to 87 out of his 101 episodes, unable to counterattack. Hyo-jung seized the opportunity, adding, 'Eun Ji-won also said, 'Without Hyo-jung, could you have become a regular on 'Mr. House Husband'? Is your position now in jeopardy?' delivering a counterpunch that knocked Park Seo-jin down.
Kim Yong-myung fanned the flames, telling the defeated Park Seo-jin, 'You lost physically and mentally,' while Ji Sang-ryeol added, 'Without Hyo-jung today, there wouldn't have been any airtime.' Only mentor Kim Bo-sung maintained loyalty, saying, 'Seo-jin let her win with an older brother's heart,' ending the sparring match with a heartwarming sibling hug.