Kadokawa announced Wednesday that Kyōsuke Kamishiro and Takayaki’s light novel series Mamahaha no Tsurego ga Moto Kano Datta (My stepmother’s daughter was my ex-girlfriend) has an anime in the works. Kadokawa did not announce the anime’s format or debut date.
The novels focus on Mizuto and Yume, a former couple who enjoyed a relationship in high school but grew increasingly irritated with each other and used their graduation as an opportunity to break up. But the day before entering high school, the two meet again in the most unlikely way: with their parents announcing a marriage, with Mizuto and Yume now becoming stepbrothers. Wanting to prioritize their parents’ relationship, the two promise not to waste time with each other, establishing a rule that “the first to get turned on” loses.
Kamishiro began serializing the story on Kakuyomu’s website in August 2017 and uploaded the latest chapter on February 6 earlier this year. Kadokawa began publishing the story in printed volumes with illustrations by Takayaki (Arifureta – From Commonplace to World’s Strongest), beginning with the first volume in December 2018. Kadokawa published the sixth volume on February 1 and the seventh volume on July 30. . .
Rei Kusakabe launched a manga adaptation of the novels on Kadokawa’s ComicWalker website in December 2019. Kadokawa published the manga’s third volume on May 8.