Yukino's diary is a simple composition notebook with the words 'AP Calculus' scrawled across the front, so if anyone finds it they won't be to interested in opening it. She keeps it in her bag so she can write down her story ideas at a moments notice, which she often does. Its mostly filled with poems and stories, and a couple things about her day. When at home she hides it in a secret area in her second desk drawr on the right.
