"What's you favourite season?" he will ask one day out of nowhere. It is a question that brings to mind memories neither of them particularly want to think about.
She will ponder her answer before deciding, "Autumn. The weather's nice, not too cold, not too hot." She will pause before whispering, "And yours?"
"Spring." he will reply automatically and she will be surprised.
"Is that… because of Kana?" she will ask sadly.
He will shake his head, an understanding smile on his face, "It represents rebirth," he will say, taking her hand gently, "and I'm ready for a fresh start."