Because it can't always rain acid
During April 1st, there will be feathers falling all over Kiseki /o/
Some will be just typical white feathers, and some will look like Sakura's feathers (in case you've never seen a color illustration of those, the black marking on them is supposedly red).
They won't be magical like hers, they'll just look exactly the same.
As usual, feel free to ask any questions o/