Unnamed Memory is a Japanese light novel series by Kuji Furumiya. It originated from the novel posting website Shà Âsetsuka ni Narà  in September 2012. It was later acquired by ASCII Media Works, who published the series with illustrations by Chibi under their Dengeki no Shin Bungei imprint. The series was published in six volumes, released from January 2019 to April 2021. A manga adaptation with illustrations by Naoki Koshimizu began serialization in ASCII Media Works' Dengeki Daioh magazine in September 2020. As of March 2026, it has been published in ten tankà Âbon volumes. An anime television series adaptation produced by ENGI aired from April to June 2024, with the second season aired from January to March 2025.
Oscar, the crown prince of the powerful country of Falsas, is under a curse that prevents him from having descendants; the curse will kill any woman who bear his child. Climbing the tower where the Witch of The Azure Moon resides and completing heràtrial, Oscar wishes that his curse be lifted. The witch, Tinasha, confesses that it is almost impossible to break the curse, but provides an alternativeâÂÂto take a woman with great magical power that the curse is unable to kill, as a wife. Oscar suggests Tinasha herself become his wife instead; she refuses, but agrees to accept Oscar's request to descend her tower and live in Falsas with him for a year.
Written by Kuji Furumiya, the series started as a web novel published on the Shà Âsetsuka ni Narà  novel website in September 2012. It was later acquired by ASCII Media Works, who published the series with illustrations by Chibi under its Dengeki no Shin Bungei imprint. The first volume was released on January 17, 2019. The sixth and final volume was released on April 17, 2021.
In July 2020, Yen Press announced they licensed the series for English publication.
A sequel series titled Unnamed Memory: After the End began publication on February 17, 2022.
A manga adaptation, illustrated by Naoki Koshimizu, began serialization in ASCII Media Works' Dengeki Daioh magazine on September 26, 2020. As of March 2026, the individual chapters have been collected into ten tankà Âbon volumes. The manga is also licensed by Yen Press.
An anime television series adaptation was announced on December 13, 2022. It is produced by ENGI, and directed by Kazuya Miura, with scripts written by Deko Akao, character designs handled by Chika Nà Âmi, and music composed by Akito Matsuda. The series was initially scheduled for 2023, but was later delayed due to "production circumstances", and eventually aired from April 9 to June 25, 2024, on AT-X and other networks. The opening theme song is , performed by Tei, while the ending theme song is "blan_", performed by Arika, a music unit composed of voice actress Yà «ko Natsuyoshi and composer and guitarist Yamato. Crunchyroll streamed the series.
Following the final episode of the first season, a second season was announced, and aired from January 7 to March 25, 2025. The opening theme song is "Unsung ballad", performed by True, while the ending theme song is "inclusion", performed by Arika.
Rebecca Silverman from Anime News Network praised the ending of the first volume and its illustrations, while also criticizing the start. Demelza from Anime UK News had similar feelings, while also praising the characters.
In the Kono Light Novel ga Sugoi! guidebook, the series ranked first in the tankà Âbon category in 2020.
Anime News Network listed the first season of the anime series as "The Worst Anime of 2024". Furthermore, Rebecca Silverman points out failure in the animation, and "stripped-down adaptation that sucked every last bit of romantic tension from the story" as well as "sped-run plot".