O Hime-sama wa Nemuranai (お姫サマは眠らない?) is a manga anthology written and illustrated by たかはしさなえ. It was compiled into a single volume published by Ohzora Shuppan in April 24, 2004. It features the characters of Tsukihime, Kagetsu Tohya and Melty Blood in a slice of life comedy stories.[1]