Divine Beast Ascension - Chapter 418

Rhett never expected becoming king until he slayed an ice dragon out of self defense and fulfils an ancient dragon slayers prophecy which makes them to crown him as their king.Transported to a gloomy and medieval like world, he is faced with leading the dragon slayers, the weakest of slayers among other slayers - demon slayers, gargoyle slayers, ghost slayers and shadow slayers.But ruling isn't so glamorous as he had anticipated and he is instead a warrior, with a system like ability which he must level up by slaying Dragons.And to his disadvantage, the world he is his controlled by SLAYERIOUS, an unknown and unseen entity. But that won't stop Rhett, he intends on dominating his world and even daring to slay the strongest dragon still alive, ruieen.And who knows, he might just defeat SLAYERIOUS if he tries harder.[WSA 2025 ENTRY]

Never underestimate the guy who has so much Mana it should kill him...Nathaniel's bus ride was supposed to be just another boring commute. But now, he, 23 fellow passengers, and a corgi named Biscuit are stuck in a “Hell difficulty” tutorial, battling monsters and leveling up.Easy difficulty, anyone can handle. Normal difficulty, you've got to put up a fight to get by. Hard difficulty is where only the tough ones last. And Hell? That's where you have to be a bit out of your mind!With his terrifying talent for mana manipulation, Nathaniel decides to invest every stat point into mana. Attribute imbalance be damned. It will either kill him before the monsters and his enemies can, or turn him into one of the most powerful beings within the system.

This is a cliché story about two young people saving the world.