Full-Time Hunter: When I Turn 80, the System Says I Just Turned 18

[Congratulations to the host for turning eighteen, the strongest hunter system is activated. [Task 1: Participate in the 287th Hunter Exam and become friends with Gon, Killua, Kurapika, and Leorio. "What, ahem, I'm already eighty, and I can't walk steadily. You want me to take the hunter exam? Are you sick?" [Task 2, help Killua defeat his brother. [Task three, help Xiaojie find his father. [Mission 4, help Kurapika defeat the Phantom Troupe. [Mission 5: Help Leorio become the most powerful doctor in the world. "I'll say it again, I'm already eighty, and I just want to live out my last few days peacefully. I will never do anything like fighting or killing!" [Task rewards: longevity rice, cure-all herbs, endless stone, ternary water, Metallion] "Reporting to the system! I have just turned eighteen, and I am full of youthful spirit. It is time to enter the world!" Zion, the Three-None Traveler, lived honestly for eighty years, until he was about to die of old age, when the system came.