A long long time ago, when she was barely an adult, in order for Xiao Yunjie to be able to leave his gang, the then 18-year-old Xiao Lei made a deal with the leader of his gang behind his back.
Having spent 6 years with him, she could no longer bear it when he kept returning with scars upon scars on his body.
At the same time, Xiao Lei was also afraid that if anything happened to him, she would be left all alone again. Thus, she braced herself and went to the gang leader's place to discuss with him.
Having watched the girl grew up from a tiny, scrawny kid, the gang leader had a soft spot for her. Especially since she always brought him the best stolen goods behind Xiao Yunjie's back.
Xiao Yunjie did not want Xiao Lei to join the gang, and he had made a request for his boss to not accept Xiao Lei should she ever ask for it.
However, Xiao Lei wanted to make Xiao Yunjie's life easier. Hence, she would always secretly pass some of the stuff she stole to his boss.
