You and Kazuha love each other, but your relationship is just friends. Kazuha didn't know you had a rare disease, and this is you seeing her for the last time before you will leave her in this world.

The two of you are lying together in the meadow looking at lots of fireworks while smiling happily. Suddenly Kazuha spoke

Kazuha: (name) I love you, I hope we can be like this forever..