'Salim Man 2' Park Seo-Jin Takes on 100-Day BodyProfile Project to Lose 20 Kilograms for His Younger Brother

'Living Men Season 2' Park Seo Jin decides to go on a diet for her sister.

On the 29th episode of KBS2's 'Living Men Season 2' (hereinafter 'Living Men 2'), singer Park Seo Jin will challenge her sister Hyo Jung to a 100-day body profile project.

Park Seo Jin, who previously had a suture surgery for a torn ligament in her finger while helping out at her parents' dried fish shop, visits an orthopedic clinic for rehabilitation. When asked by the doctor if she had any other discomfort after the finger treatment, Park Seo-jin replied, "My neck and shoulders are not good because I usually sleep a lot when I play long ball and move around my schedule. When the pain is severe, I even want to pull my shoulder out."

When the doctor says, "You might not be able to play anymore," Park Seo Jin is shocked and realizes the importance of taking care of her health. Watching from the studio, Eun Ji Won reveals an anecdote about how she once suffered from sleepwalking and fell out of bed and cut her back on a drying rack.

Meanwhile, Park Seo Jin's sister Hyo Jung, who usually sticks to comfortable clothes, goes all out for her friend's wedding, wearing full makeup, a dress and high heels. Hyo-jung is excited to go out, but soon afterward, she returns home injured and upset.

After receiving the results of her doctor's appointment and realizing that she needs to take care of her health after her sister's injury, Park Seo-jin compares Hyo-jung's past and present photos and starts nagging her about her weight change. Park Seo-jin then goes for an impromptu weigh-in with Hyo-jung and is left speechless by the shocking numbers.

In the end, Park Seo-jin suggests a diet, saying, "I'll build muscle in 100 days, and you should lose weight and take a body profile." Hyo-jung replies, "I'll lose 20 kilograms," and shows her determination.

However, soon after starting the diet, Park Seo-jin has another plan for Hyo-jung, who is faltering due to her food cravings, and the handsome tutor who had previously shaken her heart has reportedly reappeared.