Sister-in-Law: I'm Really Not a Fool Anymore

Feigning madness for five years, I turned the tables and slaughtered my enemies to reach the pinnacle! Then, in a moment of truth: it’s my turn to protect you all for eternity! A family of ten was brutally murdered, and seven beautiful women insist on marrying me? [Original Webtoon](https://ac.qq.com/Comic/comicInfo/id/656568)