One of the most anticipated news about Black Butler - Emerald Witch Arc is the reveal of the anime's ending theme song. The official website of the Black Butler anime series has confirmed that the boy band RYUGUJO will debut as the performers of the ending theme song "WALTZ" for the Emerald Witch Arc, which is scheduled to air in April 2025.
Black Butler: Emerald Witch Arc Reveals Ending Song and “Awesome” Cast
One of the most anticipated news from Black Butler : Emerald Witch Arc has been officially confirmed: boy band RYUGUJO will perform the ending theme song “WALTZ” . This is the group’s first time participating in an anime project – and they chose a dark, ghostly world like Black Butler to debut. “WALTZ” is expected to push viewers’ emotions to a climax, true to the series’ characteristic mystical color.

Earlier in January, the opening theme song “MAISIE” performed by the band Cö shu Nie also excited fans. Known for Tokyo Ghoul:re, these two rock members promised to bring a tragic song, suggesting the depth of Ciel Phantomhive’s new journey.
The production team and cast remain "classy"
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Director: Kenjiro Okada (CloverWorks)
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Screenwriter: Hiroyuki Yoshino ( World Trigger )
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Character design: Yumi Shimizu ( Horimiya )
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Voice actors: Maaya Sakamoto (Ciel Phantomhive), Daisuke Ono (Sebastian Michaelis)
The return of the Maaya – Ono couple is a guarantee of quality, especially when both have accompanied the series since the beginning.
New Story, New Music – But Still Black Butler
In Emerald Witch Arc , viewers will continue to follow Ciel and Sebastian as they uncover the dark mysteries behind the cases, with dramatic plot twists and stunning visuals from CloverWorks.
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The Dark World of Black Butler
The Black Butler anime series tells the story of Ciel Phantomhive, a young boy who is the heir to the Phantomhive family, the most powerful family in England. However, Ciel's life is full of tragedy. He witnessed the brutal murder of his parents and endured brutal torture before signing a contract with a monster – Sebastian Michaelis, a demonic servant summoned from hell. Together, they roam the dark streets of London on a mission of revenge and eliminating evil.

The Emerald Witch Arc is sure to continue exploring the dark world of Ciel and Sebastian, delivering breathtaking action and dangerous intrigue.
Why you can't miss the Emerald Witch Arc ?
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Quality music : “WALTZ” and “MAISIE” – two completely new and emotional opening/closing songs.
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Profound content : Continue to peel away the twists and turns in Ciel's tragic fate.
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Top visuals : CloverWorks never disappoints.
Are you ready for a new adventure with Black Butler? Don't forget to mark your calendars and watch Black Butler : Emerald Witch Arc next spring!
Anime is scheduled to air in April 2025 on Crunchyroll – where all the previous Black Butler episodes are streamed. This will be a great opportunity for you to rewatch the series or start a new journey if you are a "newbie" fan.
Are you ready for a new adventure with Black Butler? Don't forget to mark your calendars and catch Black Butler: Emerald Witch Arc next spring!