Sanae gets presents even in Gensokyo (Yeah, im totally ignoring the fact this is a young Sanae and probably in the "outside" world), proof she IS a good girl!
Actually there's a plot point buried somewhere that things people *refuse* to believe in show up in Gensokyo. So when people started disbelieving the moon landing... someone landed on Gensokyo's moon. So...
Why isn't Mister Santa coming to our house?It'll be weird not giving any presents to a good girl like Sanae.True enough. Christmas is an event that makes children happy.He's not coming because I'm a bad girl...Sanae...!?