Orange Love (movie, 2007)

A sickly man places a classified ad in which he offers a huge downtown loft apartment, utilities, food and eventual ownership of the flat with just one proviso: the couple who moves in must love each other so much that they can remain in the flat all day until the old man’s death. If one of them leaves, the deal is off. Enter the pale and auburn-haired Katya, a cellist who meets photographer Roman, a handsomely muscular young man.