This certain grim reaper girl agreed to live with her victim-to-be (a middle-aged man riddled with disease) under the condition she'll receive his soul once he's dead (he left her favorite drink (it was milk coffee (?))on the cabinet before he died), turns out he is her boyfriend from her past life and they passed on to the afterlife. In the end, she's living happily with his husband (the guy) and their daughter. Any title rings a bell?