Boasting a beard and gray wavy hair, 65-year-old Kim Chil-doo glared into the wall, poised and confident, as he practiced his runway walk among young, pin-thin models at an academy in Seoul this month.

Kim became South Korea's first senior fashion model last year, realizing his lifelong dream with a charismatic debut at Seoul Fashion Week.

"This was what I wanted to do when I was young but gave up to make money, and I thought maybe it's worth trying even now," Kim said. "And I'm glad I did it — being a model is really fun. Senior? It's just a label."