It's a great movie about a girl who sees dead people and how that interferes with her ability to lead a normal life.
It has a couple of creepy parts, but it's mostly a romantic comedy. It's a hard film to really classify. I definitely recommend it.
Are you sure it is a Korean movie?
That sounds like the Hong Kong movie
“My Left Eye sees Ghost”
That one is on my list but I cannot find it in a free venue