Dude, She's Like, in a Coma!: Different than typical, but should still qualify: Li takes Sakura, still in a coma, out of the hospital to use her as a goal in Torika's Final Judgment, which involves her trying to transform all her Star Cards into Heart Cards in order to save Sakura's life. Of course, Li is fairly confident of the outcome.
Everybody Hates Mathematics: Torika would be fairly good at it, were it not for Ms. Avery. Sakura, on the other hand, was terrible at it, even in college, where said Deria Avery helped her out... all the time.