"He's determined, I wouldn't be able to live with myself if I used the trust he has in me against him." Kakashi replied in his best faux scandalised tone. At Obito's next question, Kakashi raised a pale eyebrow. Sleep? Obito expected him to sleep? Here? Like this? Covered in flecks of blood and suffering from his excitement in battle? What a masochist.
"Sorry, I can't." he lied automatically. "If I did the world as we know it is sure to end."