The Peace Ambassador Has a Pineapple Head

Synopsis: After decades of slaving away for the Vongola, this poor sucker dies of old age and is reborn as his younger self! Back then, he'd just obtained the Rinnegan and was still being tormented by the experiments. But after being reborn, he rises to power. As the Vongola's Mist Guardian, the most inscrutable man around, and the world's strongest illusionist, a max-level player returning to the beginner village, he's invincible! It only takes a couple of days for him to spot a creepy old man trying to lure a child away: “You said your name was... Well, take a look at these books. I think you could write something like them too.” 69: Kufufufu... A literary genius shouldn't be going around picking fights. He should be writing books and getting them into the school curriculum! Some doctor: Why has my Diamond started writing books? This is... actually pretty good! More worlds are still being unlocked~ Theme: Even in darkness, keep reaching for the light