The series was produced by Science SARU and directed by Naoko Yamada, and streamed from September 16 to November 25, 2021 on Fuji TV's on Demand (FOD)'s service, as well as on Funimation.

The kind, level headed and responsible Shigemori invites Biwa to come live with him and his family under the auspices of being a playmate and companion for his children, but hopes that her power can prevent the downfall of the Taira clan.

The trio previously collaborated on A Silent Voice (2016) and Liz and the Blue Bird (2018) at Kyoto Animation, while Yoshida and Ushio had worked with production studio Science SARU.

Analyzing the first six episodes, Rebecca Silverman rated the series with 4 and a half stars, concluding that "it may still be a bit of a confusing story to follow, but it's also one that has survived this many centuries for a reason.

"[13] Following the conclusion of its streaming release, The Heike Story was named one of the best series of 2021 by Anime News Network,[14][15][16] Paste Magazine,[17] Comic Book Resources,[18] /Film,[19] the editorial staff of Crunchyroll,[20] and Polygon.