Actor Seo Do-young made his first appearance before viewers in MBC's new daily drama 'Family Relationship Certificate' as Cha Seung-hyun, a husband and son.

In the drama, Cha Seung-hyun, played by Seo Do-young, is the son of Noh Young-joo, portrayed by Lim Ji-eun, and the spouse of Dang Ngoc Mai, a daughter of a Vietnamese tycoon played by Jung So-young. In the first episode, Cha Seung-hyun carefully navigates a tightrope between his mother and wife. Even when his wife returned late from a club, he actively shielded her while simultaneously showing attentive care for his mother.

Notably, when his young son appeared, Cha Seung-hyun said, "Daddy will give you milk," and moved to attend to him. While preparing formula, when Noh Young-joo criticized her daughter-in-law's behavior, Cha Seung-hyun defended his wife, saying, "Mai likes parties. It's cute, isn't it?" Additionally, when a conflict arose over the issue of moving, he showed a warm and considerate side toward his mother, saying, "If you don't go, Mom, I can't go either."

Ahead of the first broadcast that day, Seo Do-young shared his thoughts, saying, "The exciting first broadcast has begun. We're having so much fun filming, and thrilling stories are set to unfold in full force." He added, "Please give lots of viewership to 'Family Relationship Certificate,' created by a solid group of talented actors coming together."

Meanwhile, 'Family Relationship Certificate' features a diverse cast including Park Se-young, Han Go-eun, Lim Ji-eun, Sung Yi-eon, Park Sol-la, and Jun Seung-bin, and airs every weekday at 7:05 PM.