"Black Butler" (BLACK BUTLER) is a manga work created by Japanese manga artist Yana Toboso, which was later adapted into an anime.It started in 2006 and is still ongoing.This work is known as a dark fantasy work that combines various elements such as gothic horror, adventure, mystery, and comedy.The story is set in late 19th century London.The protagonist is a butler named Sebastian Michaelis, who serves as a squire for a young boy, Ciel Phantomhive.However, Sebastian has a secret that is different from ordinary butlers.He has made a contract with the devil, and his mission is to support Ciel while facing the darkness that Ciel has and fulfilling his wishes.Ciel Phantomhive is a boy who was the head of a prestigious noble family, but suffered a tragedy in the past.He seeks out who destroyed his family, and joins Sebastian in his quest for revenge.As black butlers, they solve a series of incidents and mysteries while making full use of Sebastian's power and wisdom as an elite demon.This work is characterized by a unique world view that perfectly blends elegant Victorian era settings with dark and spooky elements.Yana Toboso's beautiful illustrations and detailed storytelling make it easy for readers and viewers to become immersed in the world of the story.The characters are also attractive, especially Sebastian, who is popular for his cool and invincible atmosphere, and sometimes his comical side.On the other hand, despite being young, Ciel has an excellent mind and a strong will, and many fans sympathize with his past and inner conflicts.The story is not just action and adventure, but also contains deep themes such as human greed, sin, retribution, and loyalty.In addition, one of the attractions is that there are many developments that surprise readers and viewers, with complex puzzles and tricks appearing.It was also made into an anime, and in that case, the story of the original manga was faithfully reproduced, while the characters and scenes were devised according to the animation.Also, the acting of the voice actors is excellent, adding even more charm to the characters."BLACK BUTLER" attracts many fans not only in Japan but also overseas.In particular, viewers in Europe and the United States have accepted the setting of the Victorian era and the British atmosphere of the characters, and are gathering support across national borders.Finally, this work contains some violence and dark themes, which may be inappropriate for some people.However, for those who like dark fantasy and those who are interested in complex stories, "BLACK BUTLER" is one of the works that cannot be overlooked.Please experience the charming story created by Yana Toboso's talented creation and unique worldview.