Firefly Wedding

Set during the Meiji era, Satoko Kirigaya is the daughter of an earl and renowned for her beauty and position. However, she does not have a lot of time left to live due to a heart condition; her only dream is to marry for the good of her family. However, her peaceful existence is unexpectedly disrupted by the attack of a mysterious assassin, Shinpei Goto. In desperation, Satoko proposes marriage. Although it was supposed to be a fake relationship, Shinpei proves to be a man full of love. Over time, his deep love touches Satoko's heart, and her guilt over the false engagement begins to grow.

Satoko Kirigaya (桐ケ谷 紗都子, Kirigaya Satoko) Voiced by: Yui Ishikawa (PV), Lynn (anime) Shinpei Goto (後藤 進平, Gotō Shinpei) Voiced by: Koki Uchiyama (PV, anime) Kōtarō Ogawa (小川 康太郎, Ogawa Kōtarō) Voiced by: Kent Itō (anime) Mitsueda (三枝) Voiced by: Kenjiro Tsuda (anime)

Written and illustrated by Oreco Tachibana, Firefly Wedding began serialization on Shogakukan's Ura Sunday manga website and MangaONE app on January 1, 2023. The series ended its main story on February 2, 2026, with seven spin-off chapters set to be released between February 2 and August 3, 2026. Its chapters have been collected into twelve tankōbon volumes as of June 2026. The series' chapters are published in English by Comikey. In May 2024, Viz Media announced that they would release volumes of the series in Q2 2025.

An anime television series adaptation was announced on January 12, 2026. It will be produced by David Production and directed by Takahiro Kamei, with series composition handled Yūko Kakihara, characters designed by Yukiko Aikei, and music composed by Nogrid. The series is set to premiere on October 9, 2026, on the Noitamina programming block on Fuji TV and its affiliates. The ending theme song is "Yumegokochi" (夢心地; lit. 'Trance'), performed by Tooboe. Crunchyroll will stream the series. Muse Communication licensed the series in Southeast Asia.

A voice comic commemorating the release of the first volume was released on Flower Comics' YouTube channel on June 19, 2023. A television commercial and promotional video commemorating the release of the second volume was released on MangaONE's YouTube channel on September 12, 2023. The voice comic features the performances of Yui Ishikawa as Satoko Kirigaya and Koki Uchiyama as Shinpei Goto, while the promotional video and commercial features only Uchiyama reprising his role as Shinpei.