Is this really a Game?! - Chapter 1125 Defending the Fortress Nearly Halfway Through

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

#Expect a big Harem but MC won't mindless collect women on a whim. There's deep mature content. Beware!After getting rejected and humiliated by the very woman he's ever loved—and publicly dumped during lunch break in front of half the school while holding a giant teddy bear, blue roses, and a handwritten love letter titled “My Heart in .mp3”—Jayden Cross thought life couldn't get worse.Then he wakes up with a system talking in his ear.[Ding! Welcome to the Ultimate Copy and Paste System!][Function Unlocked: 10x Copy and Paste!]Now armed with a divine-level Ultimate System Jayden begins rebuilding his life with just copying and pasting everything and gets 10X more!What the world, the system, and the universe had shattered without remorse, only the Ultimate Copy and Paste System could restore. But it did not simply mend—it reimagined. It rewrote his broken existence into a force no storm could contain, only follow.

Vainqueur Knightsbane is your average dragon: a giant, fire-breathing lizard who loves to take naps on his golden hoard, kidnap princesses for fun, and make the life of adventurers miserable. Vainqueur's only pleasure in life is to watch his treasure get bigger, one coin at a time.

So when a would-be thief turned unwilling minion tells him about "classes," "levels," and "quests," Vainqueur wonders if maybe, just maybe, he should consider a career change.

After all, why bother hunting monsters for free when you can get paid for it?