The widow takes her husband’s revenge.
Manga
The Widow Takes Her Husband's Revenge is a manga by Kurosawa R. It was serialized in Futabasha's Action Pizazz SP from the April 2015 issue to the February 2016 issue, and a sequel has run in Futabasha's web comic magazine Doku Ringo Comic from vol. 9, also released as an exclusive early title on Mecha Comic (Amutus).
Translated from the Japanese Wikipedia article, available under CC BY-SA 4.0. Translated and shortened by ManhWatch AI; may contain errors.