One Peace Books announced last week, via Behind the Manga, that it has licensed the romantic comedy manga series My Sweet Marriage to My Ex-Nemesis. The first volume is scheduled to be released in English on March 16, 2027.
My Sweet Marriage to My Ex-Nemesis is a manga adaptation of the light novel series of the same name drawn by Si-me, which was originally titled in Japanese as Soshiki no Shukuteki to Kekkon Shitara Mecha Amai. It was first launched in Kadokawa’s Dengeki Maoh magazine on November 27, 2024 and has released a single tankobon volume as of June 2025.
The light novel series is written by Toshimichi Uzou and illustrated by Kewi Hayashi. It was first published by Dengeki Bunko imprint on October 6, 2023. Four volumes have been released in Japan as of August 2025.
One Peace Books describes the main synopsis of the My Sweet Marriage to My Ex-Nemesis manga as:
They used to be sworn enemies. Now they’re sworn spouses.
Roshi Saigawa and Ritsuka Nagira were once bitter rivals, each fighting for supremacy within rival organizations of superpowered warriors. Their days were filled with duels, schemes, and a rivalry so fierce it seemed nothing could ever bridge the gap between them. Yet, somehow, the impossible has happened— they’re now happily married!
From bitter enemies to star-crossed lovers, these two have traded their weapons for wedding vows, and their former battles have given way to laughter, love, and the everyday chaos of newlywed life.
But just because they’ve left the battlefield behind doesn’t mean life has gotten easier. Old rivalries resurface, secrets linger, and the lines between love, rivalry, and sheer chaos blur in ways neither of them expected. From laugh-out-loud domestic disasters to heart-melting romantic moments, Roshi and Ritsuka are about to prove that falling in love with your enemy isn’t just possible — it’ s explosive.
Source: Behind the Manga (WinterVenom)
