Their "love" on that White Line of Fate
It is noteworthy that what Akira is repeatedly saying here is that ever elusive phrase “I love you”. Not “I like you”, not “I missed you”, not “I’m sorry”. What he said to Yuuki after meeting him again under the dancing aurora sky is “I love you”. The real deal aishiteru. The single phrase he said and the one he is repeating again and again encompasses many unspoken things - the promises of their happy years, the promises lost, and the promises he is now offering. It speaks of his regrets, of his repentance, and of his love.
And this is Yuuki’s choice.. Yuuki chose forgiveness. And that very much defines “love”. One of the very definition of love and its essence.