PantiesCard

It was A.D. 2000, the sky suddenly cracked, and many monsters descended from it.
At the same time, humans with wings also appeared. They were armed with “PantiesCard” and saved the earth.
The cracks in the sky have not disappeared since and monsters will fall from the sky from time to time.
To fight against the monsters, those winged humans gave PantiesCard to people on earth.

Now in 2020, PantiesCard has become a popular card game…
And one day, the hero “Santa” was assessed to have a Rank-A suitability to PantiesCard,
so he transferred to a famous PantiesCard school…