Time travel makes for strange bedfellows. Right in the middle of their fight in the Kamui dimension, Kakashi and Obito find themselves chucked on a one-way trip down memory lane. Grudgingly, they truce under a common goal-getting back.
But...Minato's alive. Rin's alive.
Kakashi's will falters, Minato grows suspicious, hidden forces come out to play, Obito vows to do whatever it takes-it's all a giant space-time bomb, waiting to explode.
[Cross-posting this from my account on Archive Of Our Own!]