Hello Stranger(2010)

"He and she, two strangers somehow have to share a journey in Seoul, a city of romance."

Overview

Two strangers meet in South Korea, each on a vacation. When he misses his tour bus, he asks a woman if he can hang out with her for a few days. They have fun together, but never tell each other their names. So when the trip is over they don't know how to contact each other.