Harry Potter: My Big Cousin Convinces People with Logic!

【Reincarnated as Dudley Dursley + Power of Logic & Strength + Fixing Canon Regrets + Power-Up via Magic Item Fusion + Straight Talker (Honest and Open Schemer) + Light System (Low Presence) + No Female Lead】

A bold and street-smart man from Blue Star reincarnates into a parallel Harry Potter world…

…as none other than Harry’s infamous Muggle cousin—Dudley Dursley.

By fixing key regrets in the original story, Dudley earns the right to fuse magical items, cleverly balancing brute force and sharp reasoning, evolving from a simple Muggle into a Concept-Level Archmage.

From there—

The Savior’s dark childhood is lit by a light so twisted it loops back to righteous.

The half-giant’s beloved dream of dragon-riding becomes reality, soaring over the Forbidden Forest.

The sweet-toothed old bee (Dumbledore) stops doing faith leaps from Astronomy Tower.

The prideful little dragon (Draco) embarks on a new path of growth, with friendship taking center stage.

The venom-spitting bat (Snape) is no longer misunderstood, but ends up tasting an even deadlier venom himself.

The pink toad (Umbridge)… actually becomes a literal pink toad.

Hogwarts undergoes sweeping educational reform.

The deeply cherished dead return from beyond the Veil.

And the brutal war that didn’t even spare the birds becomes a one-sided steamroll—with full counterattacks stacked to the max.