Born with an Immortal Body

After you transmigrate, you live a peaceful life for a few years, and just when you're about to escape your misery and cut loose, you suddenly discover a lousy System threatening to erase you. Will our irritable protagonist stir up trouble, or stir up trouble?

A fast-paced short story inspired by a sudden idea. No dragging things out, finished in twelve chapters or less.

Theme: If you repay kindness with resentment, what will you repay kindness with?