Hunter x Hunter - episode 31 - 09 Jun, 2000

Gon is determined that Killua has left against his will and Gon is going to find him. He fights Illumi for information and Illumi is about to kill him when Hisoka shows up. Illumi instead tells Gon that Killua is at the Zoldyck family home. Leorio is about to go to medical school and Kurapika is about to leave on his first job when both change their minds and decide to follow Gon as he looks for Killua. (Source: Wikipedia) Hunter Exam arc: (31/31)