The upcoming TV anime based on the fantasy light novel series The Holy Grail of Eris revealed a new trailer today that highlights the opening theme for the series, entitled “Happily Ever After feat. YU-KA”, which is performed by Reina Washio. The series broadcasts in Japan beginning January 8, 2026, and Crunchyroll will also stream it as part of the winter 2026 anime simulcast lineup . The Holy Grail of Eris Trailer 3 RELATED: The Holy Grail of Eris Anime Unveils Cecilia Adelbide Character Art The original The Holy Grail of Eris light novels are written by Kujira Tokiwa, illustrated by Yu-nagi, and published in Japan by SB Creative and Drecom Media. Yen Press publishes English language versions of the novel series as well as the manga adaptation with artwork by Hinase Momoya. JUMPEI & MORITA direct the TV anime at animation studio Ashi Productions, with series composition and scripts by Kenichi Yamashita, character designs by Chie Kawaguchi and assistant character designs by Jun Yukawa. Crunchyroll describes The Holy Grail of Eris : Betrayed by her fiancé’s lover and sentenced to public execution, Constance Grail, a plain viscount’s daughter known for her honesty, faces death—until a mysterious voice offers salvation. Scarlett Castiel, a noblewoman long thought dead, may be her only hope. Together, these unlikely allies uncover a dark conspiracy lurking in the heart of high society, where betrayal, secrets, and power collide. Source: Official The Holy Grail of Eris TV anime home page
