End of the World fic

[hesmagicandmyth]

I remember around the time when Pretty. Odd. was released, there was a standalone that was based on the line "If the world were ending would you kiss me or just leave."

I remember it was Ryan/Brendon and there were fires burning and ending the world and I think they flew away in a tiny airplane or helicopter or something.
I vaguely want to say either Ryan or Brendon had something wrong mentally though I could be confusing that with another fic.