Omae no Danna Datte Ore no Tsuma o Ubattan Dakara, Ii Darou? ~Fukushuu no Netori~

The days I thought were happy were all a lie.

"You feel so much better than him...!"
"W-What?!"

One night, Tamiya Muneharu discovers his beloved wife's affair. Moreover, her lover is a man who is also a close friend of his. He is the husband of the Sasatani couple, who live next door to the Tamiyas.

Determined to seek revenge, Muneharu decides that a simple divorce would only bring joy to that unfaithful man. Instead, he sets his sights on the wife of the Sasatani couple.

"No, stop... Let me go!"
"If you must blame someone, blame your despicable husband."

Just wait, Sasatani. I'll make you experience the pain of having something precious taken away!

[Translated from DLsite]