Identifying a Korean Music Video?

So basically it's about this guy who lives in this house with quite a
lot of clear walls and he sees something in the sky bright blue sky
and he finds that it's a girl. At the end, these people come to take
the girl away and she turns out to be an angel.

I know that it's sung by a guy, and it takes place mostly in his
house.

If you know what it is, it would be highly appreciated :]