Choi Ji Woo, MC of ”Superman Returns”, why was he sobbing during the recording? ”I grabbed my 4-year-old daughter and cried once”

Actress Choi Ji Woo chokes up as she recalls her 4-year-old daughter's kindergarten visit. On the 21st, KBS2 variety show "Star Dad's Struggles! Superman Returns"
The 535th episode of "My First Time with You" is titled "Your First Time with Me is Important for Everyone," and features two MCs, Choi Ji Woo and Ahn Young Mi, along with Superman's Kim Junho, Jason, and Mun Hee Jun.
As Jason prepares for his son Junbeom to attend nursery school, Choi Ji Woo says, "I sent my daughter Rua to kindergarten when she was 23 months old. I caught her the day before she went and asked her to go to kindergarten.
"I cried," she said, recalling her daughter Lua's first day at kindergarten. Choi Ji Woo was overcome with emotion as she said, "The day before I sent my daughter off to kindergarten, I hand-sewed a name tag onto her school uniform."
She conveys moments, especially when she recalls the time she was sewing and was able to endure the emotions that welled up inside her, and sobbed while holding her daughter close, drawing attention.
Choi Ji Woo burst into tears during the recording of "Superman Returns."
When the scene where Jun-beom, who is in a panic in the unfamiliar environment of the nursery school and his new friends, searches for Jason in tears, is shown on the VCR, the tears flow as if he is remembering his daughter, Rua.
Choi Ji Woo couldn't help but cry, "My daughter used to look for her mother like that too..." and expressed her loneliness and regret at her daughter's growth.
The cast also showed special interest in Jason's feelings as he sent his child to daycare for the first time. "Superman Returns" will air on the 21st at 9:15 pm.