My Happy Marriage is preparing for its next animated chapter with a three-episode special scheduled to premiere on October 25, 2026. Kadokawa has released the main promotional trailer for the project, offering a new look at the upcoming episodes while also revealing their opening theme. Singer Riria. will perform "Shiawase de Namida ga Deru no wa.", a song that accompanies the latest footage of Miyo and Kiyoka. All three episodes will air in Japan on the same day, beginning at 7:00 p.m. JST on TV Tokyo and other networks. Streaming will follow from 8:30 p.m. JST on Netflix and additional platforms.

Several familiar voices will return for the special. Reina Ueda once again stars as Miyo, while Kaito Ishikawa reprises his role as Kiyoka Kudo. The new storyline will also introduce Kimio Nagaba, voiced by M.A.O. Behind the scenes, Takehiro Kubota returns as director at Kinema Citrus after directing the first season and the 2024 OVA, as well as co-directing Season 2. Kubota is additionally overseeing the series composition, with Mika Tanaka and Ikuho Negi handling the scripts. Character design is being supervised by returning artist Shōko Yasuda alongside Hikaru Sato and Kuniyuki Itō, while Evan Call is once again responsible for the soundtrack. Kashitarō Itō will perform the ending theme, "Prelude no Temae ni: for me&you."

The franchise has steadily expanded since the anime's first 12-episode season premiered in July 2023, when Netflix also launched the series internationally. An original episode titled "Shiawase no Katachi" was later included with the eighth light novel volume in March 2024 and received a worldwide streaming release in November of the same year. Season 2 followed in January 2025, airing on several Japanese television networks while simultaneously becoming available through Netflix and other streaming platforms.

My Happy Marriage originates from the light novel series written by Akumi Agitogi and illustrated by Tsukiho Tsukioka, which began publication in January 2019. The story follows Miyo, a young woman raised in an abusive household who is arranged to marry Kiyoka, a military officer feared for his cold personality and failed engagements. Their initially difficult relationship gradually develops into an emotional journey centered on trust, healing and affection. The franchise also includes Rito Kohsaka's manga adaptation, which began in 2018, as well as a live action film released in Japan in March 2023. The movie opened at number one at the Japanese box office, selling approximately 479,700 tickets during its first three days.