I Heard that My Fiance is Super Fierce - Chapter 108 - Extra 5 – Leaflets.

An average man is reincarnated in the world of DxD! How do you survive in a world of battle-hungry monsters? With a cheat skill, of course! Devour the competition, becoming stronger with every fight! From the depths of the Familiar Forest, the Beast King will rise. (Harem, Gamer!SI)

“With my knowledge, give me a fulcrum on which to place it and I shall move the world!”

…

Sorcerer Continent—a world where sorcerers exist. Wielders of arcane knowledge. Masters of all elements. Sovereigns of space and time. These sorcerers governed the world with their unrivalled prowess. One day, a young man awakened into this world with his past forgotten and no place to call home. Follow along as Glenn, by relying on his luck and wit, tries to survive and advance in this unforgiving world. Entangled within the machinations of fate, political schemes, power struggles and wars, he forges his own path and creates a place for himself.

- Description from Novelupdates

Usually when you possess a novel, you start in the city, but I fell into the forest.

After binge-playing a game for seventy-two hours, the single-player streamer Yang Yu, who made his living selling game guides, quietly passed away in his bed.Unaware of his own death, he was invited by a deity to conquer an RPG game, and was persuaded into choosing the hardest civilian starter.Couldn't even defeat a single slime after leaving the novice village? Want to learn a taunt skill but have to actually verbally taunt? And the gacha only yields trash?Faced with numerous hardships, he actually... got excited.A true gamer never fears challenges; they only fear the game being too easy.As his sparse panel began filling out, Yang Yu felt an unprecedented satisfaction swell within him, and he became addicted to making waves, unable to stop himself.'Hey? There seems to be a lone hero up ahead. Watch as I turn him into a unit of combat power! Damn, I’ve been spotted. Hero, don't run away!'