Leo's father and Joseph's father were intimate friends, and they graduated from the same school. It was a coincidence that later in the year, Joseph and Leo also studied at the universities of their fathers, which also laid a good relationship between the two of their families. Jenny's parents were brilliant diamond experts. They dealt with all types of diamond mines all over the world. Because of their technical skills, they had always been the most important partner for Joseph and Leo's families. Unfortunately, in an exploration operation of an exotic diamond mine, the local ruler was enraged because her parents didn't negotiate with the local government, and they were finally killed by the rulers.
Since Jenny became an orphan, she had been adopted by Leo and Joseph's family. Therefore, to some extent, Jenny actually was their sister.
