After My Family Was Wiped Out, I Married the Son of My Enemy

The orphan of the exterminated family lurked for seven years, just to recover twenty-seven lives from the Mo family. But the son of the enemy knew who she was, yet he was willing to be the knife in her hand. The activation condition for the last secret chess piece is - marry him. She is married. Then she discovered that she was never the one who made the real layout.