Hitokui Hime no Cavaliere

Bee used to be a mercenary of such high skill, she had the nickname 'Lucky Black Bee'. But now she works as a humble part-timer longing for "peaceful days", and she can't keep any job for long due to her naturally rude personality. One day, a young girl— the daughter of a female ex-colleague Bee was fond of—shows up and enlists her services as a bodyguard...