Oh look, I can claim a first place spot. Not sure how long it'll last, though...
Easy - ReimuA
Karisa - 1,229,960,250 - C - 0.0% - ReplayEdit: If it isn't obvious, this obsoletes the KarisaMirisame score. I use just Karisa on the replay page anyway, so I don't see a point in writing my longer YouTube name here.
Edit 2:
Easy - ReimuA
Karisa - 1,307,734,030 - C - 0.0% -
ReplayOK, I didn't fail Kanako's fourth card this time... but instead I failed Kanako's third card. Whatever, it's still 1.3 billion.