Through the piercing sound of screaming fans, U-KISS danced and sang their way through their first and only show in San Francisco on this tour.
And for 22-year-old lead performer Kevin Woo, this is a welcomed homecoming.
"I haven't live in the Bay Area since I was 16, a freshman in high school," he said.
Kevin grew up in Danville and went to Monte Vista High School. He joined U-KISS about four years ago.
Since then, it's been a whirlwind adventure into the world of Kpop, or Korean Pop.
"I know the Kpop scene is getting bigger in America, especially with Psy and the Gangnam Style," Woo said. "I'm pretty sure a lot of Kpop groups will be coming to the states."
Their YouTube videos rack up views by the millions. And their fans are not shy about screaming their adoration.
Devoted U-KISS fans have come here to see them in concert from across the country, and around the world.
Some even lined up outside the Warfield Theater at 4 a.m. to make sure they were first in line.
For home town singer Kevin Woo, being on this stage is a dream come true.
"When I was younger I would pass by the Warfield Theater all the time," he said. "So I would always dream about when I would come to this theater and perform, but today is the day. It's a big day."
Next stop on this U.S. tour by Mnet America is Los Angeles, then back to Korea.