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The Holy Grail of Eris TV Anime's 3rd Promo Video Previews Opening Theme Song

posted on by Alex Mateo
Reina Washio performs opening theme "Happy Ever After feat. YU-KA"


The official website for the television anime of Kujira Tokiwa and Yuunagi's The Holy Grail of Eris (Eris no Seihai) light novel series began streaming on Friday the third promotional video, and it previews the opening theme song "Happy Ever After feat. YU-KA" by Reina Washio:

The Holy Grail of Eris key visual
Image via The Holy Grail of Eris anime's website
The anime will debut on TBS and 28 affiliate stations on January 8 at 11:56 p.m. The anime will then air on BS11 on January 10 at 1:00 a.m. The anime is scheduled to premiere online first on ABEMA and the d Anime Store before its broadcast debut, but the staff will reveal the exact online debut details at a later date. Crunchyroll will stream the anime as it airs.

Kana Ichinose stars in the anime as Constance Grail and Sayumi Suzushiro stars as Scarlett Castiel. Both are reprising their roles from the light novel's previous drama CD.

The cast also includes:

The staff includes:

Yukari Tamura performs the ending theme song "Camellia."

Tokiwa launched the story on the Shōsetsuka ni Narō website in 2017. Drecom published the original light novel's five volumes simultaneously in November 2024.

Yen Press releases the light novels in English and describes the story:

Connie is a young noblewoman whose only standout quality is her sincerity. Maybe that's why she loses her fiancée and gets framed for a crime in the span of one night. Just as all hope seems lost, the ghost of an infamous villainess who was executed years ago possesses her and clears her name. With her incomparable charisma and intelligence, the spirit of Scarlet Castiel turns the tables in the blink of an eye. In return, Connie insists that she help uncover the truth surrounding her new benefactor's untimely death and a conspiracy that continues to this very day!

Hinase Momoyama's manga adaptation launched on Square Enix's Manga UP! web manga site and app in 2019. Yen Press also publishes the manga adaptation, and Square Enix's Manga UP! Global publishes the manga digitally.

S.Kosugi launched a sequel manga adaptation titled Eris no Seihai S (The Holy Grail of Eris -SEQUEL-) in October 2024.

Sources: The Holy Grail of Eris anime's website, Comic Natalie



Disclosure: Kadokawa World Entertainment (KWE), a wholly owned subsidiary of Kadokawa Corporation, is the majority owner of Anime News Network, LLC. Yen Press, BookWalker Global, and J-Novel Club are subsidiaries of KWE.

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