On May 3, Jeeseokjin World's YouTube channel unveiled a new vlog titled "Running Man Ji Hyo’s First-Ever Vlog Revealed! The Life of CEO Nina Song," offering fans a rare insight into actress Song Ji Hyo's role as the head of her lingerie company.

In the video, Song Ji Hyo took on the new challenge of designing pajamas for her 'Running Man' colleague Ji Suk Jin, starting by measuring his waist, which surprised him when she revealed it to be 95 centimeters. Ji Suk Jin expressed disbelief and questioned the accuracy of the measurement.

During his visit to her office, Ji Suk Jin raised concerns about the size of the workspace, having seen it on Kim Jong Kook’s YouTube channel and finding it unusually spacious for a new business. He wondered if the high rent might become a burden.

After inquiring about the company's success from a staff member, who attributed the recent sales boost to Kim Jong Kook's video, Ji Suk Jin expressed hope that featuring the enterprise on his channel would further elevate sales.

Contrary to the perception that Song Ji Hyo was just the brand's model, she clarified her deep involvement in all aspects, from taking measurements and crafting patterns to selecting materials and devising sales strategies. She highlighted the importance of using herself as a fit model to ensure product comfort.

On the topic of designing men's products, Song Ji Hyo disclosed she doesn't as she lacks personal experience with men's underwear. Ji Suk Jin humorously proposed seeking feedback from the 'Running Man' members who he teased would eagerly assist.

Ji Suk Jin candidly expressed his worries about Song Ji Hyo's business, noting her self-started venture without external funding, emphasizing that she carries full responsibility. He recounted his wife's positive experience with one of her products, motivating him to further support her by making another purchase.