Author's Note: I watched the 2010 Doctor Who Christmas Special the other day and sort of loved it. It broke my heart, taped it back up, and inspired me in the best possible way.

"Think about it, Doctor. One last day with your beloved. Which day would you choose?"

Kazran's words had haunted the Doctor as he stood at the controls of the TARDIS. So many twist and turns, knobs that served no purpose- what was the point? What was the point of anything without her?

Which day...

As the TARDIS flew to a halt and he stepped out into the snow, his mind instantly returned to his favorite Christmas- the one spent with her.

He had just regenerated, changed faces on her, and yet... and yet. She had trusted him after he recalled his first words to her. Had trusted him when the Christmas tree attacked her. Had trusted him to save her from the evil Sycorax. Had trusted him to go into the TARDIS and not abandon her like he had so many others... for their own protection, of course. Why had he been so selfish?

Which day...

She could've been with Mickey. She could've been with her mum. She could've been... well, anything. Everything.

It was a miracle when he went through a day without seeing her fall into the Void, about to leave him forever. When they had been separated, kept apart in parallel worlds. On the beach, with tears in her eyes, as she told him that she loved him. Him, out of everyone. And he was ready, about to say it; those words that could both make and break their hearts. But he had failed, waited too long.

Which day...

How could he even fathom a day with her? Every day he spent with her left him yearning for more. She had said forever. She had said she would never leave him. She had said she loved him. And all he could say was her name, the name that still haunted his very being.

"Better a broken heart than no heart at all."

While the Doctor still believed these words, he couldn't help but envy old Kazran; after all, he only had one heart to break.

Which day...

Which day-

A morbid idea crept into his mind. The worst and best idea that had ever entered his great mind. Which day would he spend with Rose?

His last. Whenever her dying day was. If they could be together on the last day they would be alive, perhaps he could be okay with one day.

His one last day with his companion of choice: Rose.

A/N: R&R much appreciated. If you love it, say so. If you don't, you should definitely say so. I promise not to be upset. :)