Will You Remember This Time?

Winning the sburb secession made Dave and Rose Immortal on earth, letting them experience every piece of history since year 0 and letting us live to see the future while everyone else that was in the sburb secession gets reincarnated every time they die in the new universe.

Dave and Rose find their lovers each and every reincarnation, making them fall in love every time. But how many times until they remember completely and become Immortal aswell?