鋼之鍊金術師fa的片尾曲是《Haven't You》，以下是其歌詞：
歌：ZAYN
Hello another day again
Survived another beating down
Poured every bit of sand into your eyes, brother
Time won't erase your memory
Memories turn to sand inside of me
How much I miss you, and my loss, just don't want to give up, so tired.
Should I wait another day to ask myself, like it or not
Are you missing the one beside you? And who to take back with me?
Keep asking these questions to yourself in this sad memory, in a vague echo of endless
memory. I can't forget the moment when I lost you.
You said we'd be together forever, brother. Haven't you?
Hello another day again, it's all so meaningless.
I can't find a way to fill the emptiness.
The one I can't forget is still in my heart. I can't forget you.
The time I wasted trying to find a way to forget you.
So tired, I'm done with it all. But still, I keep on going, brother.
Please tell me if you're still there. I miss you so much.
Hello another day again, and it's all over.
以上就是《鋼之鍊金術師fa》的片尾曲《Haven't You》的歌詞。