The Roommate Agreement

To escape financial hardship, impoverished girl Diana moves into the mansion of Russian billionaire heir Isaac. Their constant clashes stem from class differences, but as they grow closer, they slowly uncover each other's family wounds. Through fighting their common enemy Sergei, they fall in love. In the end, Isaac helps Diana win back custody of her younger brother, and Diana heals Isaac's loneliness. Together, they build a real home in the mansion.