Heartwarming / Xam'd: Lost Memories

• Although it's short-lived, the xam'd fetus lovingly reaching up for his xam'd mother's face is this. And then they both die.
• When Akiyuki and Haru are reunited in episode 19.
• Another would be Ryuuzou and Fusa's kiss at the end of Episode 21.
• Finally, Akiyuki's return at the very end. The beautiful (if somewhat surreal) live-action shot of Akiyuki's now-human hand. This drives home the point of what a blessing it is to have your humanity, to look at something as simple as your hand and know it's a human hand.