A Tale of the Secret Saint
A Tale of the Secret Saint is a Japanese light novel series written by Touya and illustrated by chibi. It initially began serialization on the user-generated novel publishing site Shōsetsuka ni Narō in January 2019. It was later acquired by Earth Star Entertainment who began publishing under their Earth Star Entertainment light novel imprint in June 2019. A manga adaptation illustrated by Mahito Aobe began serialization on Earth Star Entertainment's Comic Earth Star manga website in December 2019. An anime television series adaptation produced by Felix Film is set to premiere in October 2026.
Plot
Fia Ruud, a young girl, uses a healing potion on a black bird in the forest, which turns out to be a dragon that attacks and nearly kills her. As Fia is dying, she remembers that she was the great saint Seraphina 300 years prior in a previous life, which causes her to regain the power of a saint. Using this power, Fia saves herself enters into a contract with the dragon Zavilia. Fia decides that it is best if she hides her true identity.Characters
;Fia Ruud;Zavilia
;Saviz Nav
;Cyril Sutherland
;Desmond Ronan
;Zachary Townsend
;Quintin Agata
Media
Light novel
Written by Touya, A Tale of the Secret Saint began serialization on the user-generated novel publishing website Shōsetsuka ni Narō on January 6, 2019. It was later acquired by Earth Star Entertainment who began releasing it with illustrations by chibi under their Earth Star Novel imprint on June 15, 2019. Twelve volumes have been released as of January 15, 2026.In September 2020, Seven Seas Entertainment announced that they licensed the novels for English publication.
A spin-off light novel series, titled A Tale of the Secret Saint Zero, began publication on July 15, 2022. Six volumes have been released as of October 16, 2025.
In May 2024, Seven Seas Entertainment announced that they also licensed the spin-off series.
Volumes
''A Tale of the Secret Saint Zero''
Manga
A manga adaptation illustrated by Mahito Aobe began serialization on Earth Star Entertainment's Comic Earth Star manga website on December 19, 2019. The manga's chapters have been compiled into thirteen volumes as of October 10, 2025.In September 2020, Seven Seas Entertainment also announced that they licensed the manga adaptation for English publication.
A manga adaptation of the A Tale of the Secret Saint Zero spin-off series illustrated by Shiina began serialization on October 19, 2023. Its chapters have been compiled into four volumes as of October 10, 2025.
Volumes
''A Tale of the Secret Saint ZERO''
Anime
An anime television series adaptation was announced on March 6, 2025. It will be produced by Felix Film and directed by Tomoe Makino, with Naoki Murata serving as assistant director, Deko Akao handling series composition, Satomi Kurita designing the characters, and Kenichiro Suehiro composing the music. The series was originally scheduled for April 2026, but was later delayed "in order to aim to provide a more enjoyable work for everyone". It is set to premiere in October 2026. The opening theme song is "Flare of Soul", performed by, and the ending theme song is "Stellar", performed by Utahime Dream All Stars.Reception
By June 2024, the series had over 2.7 million copies in circulation.The series was ranked second in the 2024, 2025, and 2026 editions of Takarajimasha's Kono [Light Novel ga Sugoi!] guidebook in the category. The spin-off series was also ranked seventh in the same category in the 2026 edition.