My Happy Marriage

My Happy Marriage (わたしの幸せな結婚) is a Japanese light novel series written by Akumi Agitogi and illustrated by Tsukiho Tsukioka. Initially published online via the user-generated novel publishing website Shōsetsuka ni Narō, it was later acquired by Fujimi Shobo, who has released the series since January 2019 under their Fujimi L Bunko imprint.

A manga adaptation illustrated by Rito Kohsaka has been serialized in Square Enix's Gangan Online service since December 2018. A live-action film adaptation premiered in Japan in March 2023. An anime television series produced by Kinema Citrus aired from July to September 2023. A second season has been announced.

Synopsis
In an alternative version of the Taishō era in which spirits and magic are real, but in decline, Miyo Saimori, born without supernatural talent, is forced into an existence of servitude by her abusive stepmother. When Miyo finally comes of marriageable age, though, her hopes of being whisked away to a better life crumble after she discovers her fiancé’s identity: Kiyoka Kudou, a commander apparently so cold and cruel that his previous would-be brides all fled within three days of their engagements. With no home to return to, Miyo resigns herself to her fate—and soon finds that her pale and handsome husband-to-be is anything but the monster she expected. As they slowly open their hearts to each other, both realize the other may be their chance at finding true love and happiness.

Light novels
Written by Akumi Agitogi, My Happy Marriage began publication online via the user-generated novel publishing website Shōsetsuka ni Narō. The series was later acquired by Fujimi Shobo, who began publishing the novels with illustrations by Tsukiho Tsukioka on January 15, 2019, under their Fujimi L Bunko imprint. As of March 2024, eight volumes have been released. In June 2021, Yen Press announced that it licensed the novels for English publication.

Manga
A manga adaptation illustrated by Rito Kohsaka began serialization online via Square Enix's Gangan Online service on December 20, 2018. As of July 2024, five tankōbon volumes have been released. In July 2021, Square Enix Manga & Books licensed the manga for an English print and digital release.

Live-action film
A live-action film adaptation was announced on April 25, 2022. It is directed by Ayuko Tsukahara, with the screenplay written by Tomoe Kanno, and music composed by Akiyuki Tateyama. The film premiered in Japan on March 17, 2023, and was distributed by Toho. Idol group Snow Man performed the theme song titled "Tapestry" (タペストリー).

The film had its North American premiere at the Toronto Japanese Film Festival on June 10, 2023, under the English title As Long as We Both Shall Live. It was also screened at the Fantasia International Film Festival on August 8 the same year.

Anime
An anime adaptation was announced on April 5, 2022. It was later revealed to be a television series produced by Kinema Citrus and directed by Takehiro Kubota, with supervision and storyboards handled by Takao Abo, scripts written by Ami Satō, Takahito Ōnishi and Momoka Toyoda, character designs by Shōko Yasuda, and music composed by Evan Call. The series aired in Japan from July 5 to September 20, 2023, on Tokyo MX and other networks, with Netflix simulcasting the series on the same day globally, while Bilibili simulcasted it in Mainland China. The opening theme song is "Anata no Soba ni." (貴方の側に.) by Riria, while the ending theme song is "Vita Philosophica" (ヰタ・フィロソフィカ) by Kashitarō Itō. An original video animation was bundled with the special edition of the eighth light novel volume, which was released on March 15, 2024.

A second season was announced after the airing of the twelfth episode.

Stage play
A stage play adaptation titled Watashi no Shiawase na Kekkon: Teito Rikugun Okutsuki Kitan was announced on June 9, 2023. It featured an original story, with Kaori Miura serving as the director and writer, and Taka composing the music. Akumi Agitogi, the original author, also cooperated in the production. The stage play ran at Theater 1010 in Tokyo from August 11–20, 2023.

Reception
In 2020, the manga adaptation ranked eighth in the sixth Next Manga Awards in the web manga category. It ranked sixth in the 2021 edition of Takarajimasha's Kono Manga ga Sugoi! list of the best manga for female readers. The manga ranked first in the "Nationwide Bookstore Employees' Recommended Comics of 2021" list by Japanese bookstore Honya Club. In 2022, the manga was nominated for the best shōjo manga at the 46th Kodansha Manga Award. It ranked 29th on the 2022 "Book of the Year" list by Da Vinci magazine.

The live-action film debuted at first at the Japanese box office during its opening weekend, earning ¥654 million through 479,700 admissions. By December 2023, it earned ¥2.8 billion in Japan. At the 66th Blue Ribbon Awards, it was nominated for Best Film, and Ren Meguro was nominated for Best Newcomer.