only 2 attempts that made it to Koishi
I don't think the stage portion is that bad once you memorize/figure it out, unlike UFO.
Oh, and don't be too scared about Sanae. Even a bad player like me has 3/116 on Bumper Crop Rice Shower.
Plus, you get a bomb and 3 life fragments from her, so bombing in her spells is no harm.
Koishi IS quite intimidating before you beat her though...
especially when you haven't figured out, say, the heart cards or Genetics or Subterranean Rose,
and plus unlike other extras, it's harder to see your death coming, and you get only 5 lives (6 if you ND Koishi).