The concept of the Grim Reaper taking human form to experience the mortal realm is not something particularly new; parallels can easily be drawn to Brad Pitt's turn as a Grim Reaper in Meet Joe Black (1998). Both films share several elements in common; they involve the Grim Reaper taking on the suave visage of a pretty boy, they remove the sinister from the concept of Death itself, and they end up as a study of Life instead of Death. However, this is where the similarities end, and Sweet Rain: Shinigami no Seido, based on the bestselling novel by Isaka Kotaro (The Accuracy of Death), turns out to be a great story in its own right.
CD "Sunny Day" (March 19, 2008) is the debut single by name Kazue Fujiki (character in the movie). It entered the top ten for the first time on the Oricon weekly singles chart on March 31, 2008, and also won the 1st place on the weekly chart of May 11th - May 17th in Taiwanese KKBOX Japan and Korea music chart.