Scrap material: Phoenix Nirvana

She is the chief killer of the 21st generation. She accidentally traveled to the Xuanyuan Continent in another world that day and became the eldest lady of the Cheng family. But she didn't expect to transmigrate to the body of a good-for-nothing. . . .On that day, he met her and started a sad love. She told him: In this life, if you betray me, I will kill you with my own hands.He answered her: …