Following the broadcast of Season 2’s final episode in Japan, the official accounts for My Happy Marriage announced with a trailer and visual that a new anime is in production. Additional details, such as format and release date, were not confirmed at the time of reporting.
My Happy Marriage New Anime Announcement Trailer
My Happy Marriage New Anime Announcement Visual

Based on the light novels by Akumi Agitogi and Tsukiho Tsukioka, the My Happy Marriage anime is directed by Takehiro Kubota (ID: INVADED assistant director) at studio Kinema Citrus, starring Kaito Ishikawa (Junichiro in Tomo-chan Is a Girl!) as Kiyoka Kudo and Reina Ueda (Kanao in Demon Slayer: Kimetsu no Yaiba) as Miyo Saimori. A second season is currently in production.
Yen Press publishes an official English version of the series and describes the story:
IS THIS MARRIAGE A BLESSING? OR A CURSE?
Born talentless to a noble family famous for their supernatural abilities, Miyo Saimori 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 beautiful 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.
Source: Press Release