"My fiancé committed adultery with my younger sister and even got her pregnant, so he should take responsibility and become a 'sacrifice.'"

A story about seeking thorough revenge after being betrayed. A self-serving SS (side story). Quite dark, quite sad, everyone except the twins is selfish, a story where you can't even say things like "serves them right." It's not satisfying. The aftertaste after reading is definitely bad. I can only recommend it to people who are okay with anything no matter what. I'm also posting this on Alphapolis.