is a Japanese light novel series written by Almond and illustrated by Yoshiro Ambe. It was initially serialized on the user-generated novel publishing website Shōsetsuka ni Narō from 2020 to 2023, before being acquired and published by Earth Star Entertainment under their Earth Star Luna imprint from June 2021 to June 2023. A manga adaptation illustrated by Yona Etō began serialization on Earth Star Entertainment's Comic Earth Star manga website in April 2022. An anime television series adaptation produced by Magic Bus and Picante Circus aired from June to September 2026.

Plot The Duke has two daughters: Flora, who is beautiful and a candidate to become a saint, and Carolina, who is plain and lacking talent. One day, in order to improve relations with a neighboring country, Carolina is to be married to the second prince, despite rumors that he can be brutal and cruel. After getting married, they realized that Carolina was actually the more talented sister.

Characters /

The main female protagonist. The second born daughter of the Duke of Celestia. A kindhearted and beautiful young lady whose older sister has been belittling and abusing her, causing her to be sad and withdrawn. All of that began changing following her arranged marriage to Prince Edward, who she soon grew to love. Initially, she believed she possessed no magical abilities, but she was later revealed to have divine power that surpasses the current pope.

The main male protagonist. The second Prince of the current Emperor of Malcosias, he is a skilled knight who uses fire magic. Due to rumors, many believe him to be a cold and ruthless man while in fact he is truly a kind and noble person. He quickly falls in love with Carolina.

Carolina's older sister. An arrogant woman who treats her sister with contempt because their mother died giving birth to her. Considered to be a future saint, due to her skilled use of holy magic, she was livid to discover that her great power was actually because her sister's own divine power had been enhancing her own.

Prince Edward's right hand.

Carolina's maid who was assigned to her following her engagement. The youngest of three sisters who was also mistreated by them.

Edward's older brother and the first Prince. Due to a magical ailment, he was forced to remain confined within a holy barrier that lessens his symptoms. Following the revelation of Carolina's divine powers, she was able to cure his condition.

Carolina's bodyguard. The illegitimate son of a noble who was almost killed by his father, he grew to be a warrior who vows to protect Carolina.

The Duke of Celestia and father of Flora and Carolina.

The King of Celestia.

Flora's maid.

The Emperor of the Malcosian Empire and father of Edward and Gilbert.

The Empress of the Malcosian Empire and mother of Edward and Gilbert.

Media Light novel Written by Almond, The Oblivious Saint Can't Contain Her Power: Forget My Sister! Turns Out I Was the Real Saint All Along! was initially serialized on the user-generated novel publishing website Shōsetsuka ni Narō from 2020 to 2023. It was later acquired and published by Earth Star Entertainment under their Earth Star Luna imprint featuring illustrations by Yoshiro Ambe, in four volumes from June 16, 2021, to June 1, 2023.

During their panel at Anime NYC 2023, J-Novel Club announced that they have licensed the series for English publication.

Manga A manga adaptation illustrated by Yona Etō began serialization on Earth Star Entertainment's Comic Earth Star manga website on April 28, 2022, with its chapters collected into nine volumes as of September 2026, which will end with the release of its tenth and final volume. The manga adaptation is also licensed in English by J-Novel Club.

Anime An anime television series adaptation was announced during the "Earth Star Novel 10th Anniversary Summer Festival" event on July 19, 2025. It is produced by Magic Bus and Picante Circus, and directed by Mitsutaka Noshitani, with series composition handled by Touko Machida, characters designed by Taihei Nagai, and music composed by Supa Love. The series aired from June 30 to September 15, 2026, on AT-X and other networks. The opening theme song is "Windmaker", performed by , while the ending theme song is , performed by Utahime Dream All Stars. Crunchyroll streamed the series.

Episodes

Reception The series won the encouragement award at the 2nd Earth Star Novel Award in 2020.

References

External links at Shōsetsuka ni Narō