I was watching my gf is an alien after business proposal and realized some of the similarities like:
-Both male leads suffer from the rain and have a trauma linked to it
-Contract relationship between male and female leads
-Another male character likes the female (kind of a love triangle)
-Both males are rich CEO's and strong female leads works under them
-One male has a father while another has no parents
-The female lead helps solve the trauma (kind of)
-Happy endings
I think Business Proposal is more of a short, get-to-the-point than my gf is an alien.
Have a go, you might enjoy :)