thank you for bumping, but guys still no right answer ... it was more romantic than horror or action. the guy was living in the skycraper, the girl in the slums. the movie was more an art movie than some blockbuster ... i think i have to search movie databases for few hours and then i will show you

and, maybe its also stupid movie, but one of the few i remember from my younger years and that i cant find the name ... thanks for the replies so far!
