Yana Toboso is a Yokoyama-based manga artist born in Warabi, Saitama Prefecture. Her first manga, '9th', was published in 2004, and she subsequently made the yaoi (homoerotic) one-shot 'Glamorous Lips' under the pseudonym Yanao Rock in 2006. The Square Enix magazine Montly GFantasy has been publishing her serials since 2005, starting with 'RustBlaster', a tale about a human and a vampire. She started her ongoing serial about a demonic butler, called 'Black Butler', in 2006. The manga has been published internationally, and has also been adapted into an anime series by A-1 Pictures in 2008 and 2009.