Could someone translate that? I used an MTL for it, but I keep getting "Yuanpei Counterattack System". What is yuanpei?
Yuanpei (元配) means "first wife", literally "original mate" You're likely seeing 原配 instead of 元配, but they mean the same thing.
@Guan Zhong gave the answer. And judging by the novel synopsis, it's suitable. First Wife's Counterattack System.