Gon And Killua have known each other since pre-school. Gon's dad and Killua's knew each other from working together. Gon's father Ging was a famous detective. Gon and Killua from preschool to elementary school to high school have remained friends even though many things happened around them that changed them. Gon now lives with Aunt Mito after Ging was killed in the middle of a detective case. Gon begins to remember more and more from what his dad taught him as Gon swears to find out who killed Ging only to start to suspect his best friend. (Collab with @Killugonaddixt )