Lee Jong-beom smiles proudly at the calf power of his grandson Tae-hyun. The 609th episode of KBS 2TV's "The Return of Superman," airing on February 18, is titled "Day by Day, Already One Year." MC Kim Jong-min and Lalal join the show, revealing the appearance of Lee Jong-beom's grandson Ko Tae-hyun, dressed beautifully in hanbok for Lunar New Year.

Tae-hyun appears in an adorable Seolbim outfit. Seeing Tae-hyun, Lee Jong-beom expresses his affection by saying, "Why did you come dressed so nicely?" Tae-hyun uses the strength of his lower body to perform a traditional New Year's bow, making his grandfather's cheekbones rise with a smile. After watching his mother's bow demonstration, Tae-hyun sits down in a squat position, known as a symbol of lower body exercise, lowering his hips with a thud. Then, following his mother, he places both hands on his forehead, creating a cute gesture.

Tae-hyun steps onto a stepper and moves his calves in rhythm with his grandfather's clapping, completing 40 leg exercises. Lee Jong-beom is very satisfied with Tae-hyun's lower body power, saying, "Soon, a scouting offer from a team will come." He sincerely tells Tae-hyun, "What grandpa wanted was for you to exercise like this." Tae-hyun's calf power, which made Lee Jong-beom's cheekbones rise, can be seen in the main broadcast of "The Return of Superman."

Since its first broadcast in 2013, "The Return of Superman" has received much love for 13 years. Following Eun-woo in 2023, Jung-woo from "The Return of Superman" ranked in the top 10 for two consecutive weeks in the TV-OTT non-drama category for cast popularity in the 2nd and 3rd weeks of June 2025, establishing himself as the youngest and strongest popular sibling. In the 2nd week of August 2025, both Haru and Shim Hyung-tak from "The Return of Superman" entered the top 10 simultaneously, proving viewers' interest.

Additionally, last July, the show received the "Presidential Citation" at the 14th "Population Day" ceremony, solidifying its status as a "national parenting entertainment." The 609th episode of "The Return of Superman," airing on the 18th, contains special content for Lunar New Year and is broadcast every Wednesday at 8:30 PM.