Original title is 特別ボーナス. ボーナス (bounasu) is a loanword from the English word "bonus".

December 5th, 2012. Author's note:
"Q: Please tell us what you were passionate about as a child?
A: Graffiti."

Rumiko related an anecdote about how she doodled on the walls of her home as a very young child after seeing The Orphan Brothers (安寿と厨子王丸/Anju to Kurashiohmaru) in multiple interviews and My Sweet Sunday.