When Portcas D. Ace was alive, he always believed that he was an unwanted existence. But during the war, Ace finally understood his existence when he saw the person he loved most risking his life for him.
In this case, it doesn't matter even if you die. Because I am still loved by others.
Then in another world, Ace met someone
That person, who once had a bright smile, said to himself word by word:
"Existence is reasonable."