Touhou Youyoumu ~ Perfect Cherry Blossom
Touhou Youyoumu ~ Perfect Cherry Blossom
Yuyuko Saigyouji's theme, "Bloom Nobly, Ink-Black Cherry Blossom ~ Border of Life," is named after the story of Kamutsuke no Mineo, who is said to have written the following poem after a friend's death:

"Oh, cherry blossoms in the fields of Fukukusa: if you have a heart, bloom in dyed in ink just for this year."

Allegedy, after he finished writing the poem, the cherry blossoms near his friend's grave all bloomed ink-black
Contributed by TailsFiraga