Even after a lover passes away, the romantic spark of the relationship with them remains. At this point, though, what drives the situation forward is a determination to see them again "one sweet day," and thus, the conceit and circumstances behind this big-ticket '90s R&B collaboration that Mariah Carey and Boyz II Men sang, paving the way for a massive hit, and tearing up anyone with a remote connection to the feeling of mortality disrupting a romance in progress.