During the end of their interdimensional adventure of the day, Isabella chooses to kiss Phineas, knowing that everyone, herself included, will forget the day's events. Only that's not what ends up happening. At all. A rather awkward confession leads to a series of questions that, in hindsight, may put a pin in the whole Amnesiainator thing after all... (Alternate ending of "Across the 2nd Dimension" - not meant to be seen as a fix fic)