"The Legend of the Seven Heroes of Rainbow Cat and Blue Rabbit" fanfic, Black Little Tiger × Blue Rabbit.
She is the one I am thinking of/How can we be enemies and divide the world/Chasing the rivers and lakes, my heart will rise and fall with you/Don't forget the crescent moon that makes you dance with your flying sleeves
He is still in my mind/Let the three thousand fallen flowers in my dream/Wander the world and my heart rises and falls with you/I am used to seeing the long wind blowing your brave hair