Transmigrated in a VRMMORPG with a Programmer's Virtual Toolbox

Kain Harker, a brilliant but reclusive computer science student, spends his days hacking into games, modifying characters, stats, and worlds with ease. His latest obsession is a popular medieval VMMORPG, where magic and swordsmanship rule. One stormy night, lightning strikes his dorm, and Kain finds himself abruptly killed—and then mysteriously reincarnated into the very game world he was playing.

Born to a pair of humble commoners in a world where monsters roam and adventurers must train rigorously to survive, Kain discovers he still has one thing from his past life: a Programmer’s Virtual Toolbox, a powerful system that allows him to hack the rules of this reality just like he did with video games. Instantly increasing his stats, unlocking hidden skills, and even crafting modern technology with just a few lines of code, Kain seems destined to become unstoppable.

However, power comes with a catch. Every stat he hacks, every skill he gains, must still be mastered through physical training. Without control, his newfound strength is wild and unpredictable, his magic unstable and dangerous. To truly wield the power he's unlocked, Kain must train his body to match the absurd abilities his hacking gives him. And the more he levels up, the more tools from the Programmer’s Toolbox unlock—allowing him to bend the very fabric of this magical world.

But Kain doesn’t seek glory or wealth like the adventurers around him. All he wants is to explore this vast new world and see where the winds of fate take him. Whether it's battling powerful monsters, outwitting corrupt nobles, or creating mechanical marvels in a world of swords and magic, Kain’s journey will be unlike anything this world has ever seen.

Can a modern programmer survive and thrive in a world of medieval magic, or will his hacking powers become a dangerous double-edged sword?