We learned about a new anime adaptation in the works in July 2021 with Kadokawa confirming that Mamahaha no Tsurego ga Moto Kano Datta aka My Stepmother’s Daughter Was My Ex-Girlfriend, had gotten the green light.
A manga adaptation began in 2019 by Rei Kusakabe with three volumes out so far.
The series has Shinsuke Yanagi directing it based on the scripts written and overseen by Deko Akao.
Domestic Terrorism | My Stepmom's Daughter Is My Ex