And Japanese angels (or this sub-angel, at least) have cell phones. The soul of Kanzaki Keiichiro, in comma, is given a task to make a lonely woman to be happy, or he'll be die on Christmas Day. Of course, 'happiness' is very subjective. When he starts to approach her, she thinks he's a stalking salesman. People think she's a nuts. Or drunk.
As a Christmas movie, Koi wa maiorita is refreshing. There's no Santa, no Christmas carols (replaced by lovesick J-rock and bubbly-happy J-pop songs), there's even no church. Actors Karasawa and Esumi make a great duo. And contrary to American kids, Japanese children cannot see angels.
And another thing. Different to Hollywood, Japanese features are free to end the story NOT in happy ending (as demonstrated by various anime). This story MAY or MAY NOT concludes happily. One thing is for sure - Tokyo on Christmas is amazing.