Darn, I guess you really can't use "My hakutaku ate my homework" as an excuse after all.
Indeed, her abilities don't work quite like that. She can only hide, not erase history, and even in hakutaku mode, where she can create history, there is basically no "undo" for wrong moves.
You can feed me all you want, but your tests and homework will still be there in real life.nom nomDon't flee from reality.