Hello!

"Stars Can't Shine Without Darkness."
"In order, for the light to shine so brightly, the darkness must be present."

Allen Walker has the memories of the Fourteen Noah, there's a girl named Yuuki Marian who has The Fourteen Noah's lover memories. They have to deal with their own inner demons.

Starts from the manga chapter 57 as the anime starts in episode 57-59.
*Disclaimer: I do not own D.Gray Man. I own Yuuki and my extra characters*