Villain: From the Start, I Took the Supreme Protagonist's Place

He transmigrates to a fantasy world in sheer terror, and right after arriving, accidentally crushes a gravely wounded young man to death.

The moment the young man dies, the System binds itself to him.

Once the System is bound, he gains an opportunity.

The young man was the protagonist, crushed right from the start.

Since he was crushed to death, I shall become you.

With the protagonist's opportunities, fate, treasures, and physique inherited from the System, a villain who is greatly favored by the world appears.