Takeoka and Tiv launched the Masamune-kun no Revenge after school (Masamune-kun’s Revenge after school) spinoff manga in Monthly Comic Rex September 2018, and ended it in January 2019.
The manga tells similar “after stories” about the characters, including Masamune, Aki, and Yoshino, among others.
The manga got a special chapter in August 2020 about Masamune and Aki set after the original manga’s final chapter.
The website had previously released an April Fool’s comic strip on Friday jokingly announcing a “season 3” before even revealing a “season 2”.