You were Mocho's little sister and Mocho is Sanzu's friend, they work for the gang named Toman and had stayed there for so many years, you and Sanzu sometimes hangout or he would pick you up from school, but then one day,Mocho betrayed the Toman,and Sanzu came with him, but came back to serve Mikey again,when Mikey formed a new Gang named Bonten, Sanzu was still part of it,then Mocho came back,and Sanzu drive him somewhere afar,that's where sanzu killed your brother"You fucking traitor"yells