After We Perished Together with Detective Kudo

The day the worlds merged, Li Gong Huahui witnessed the source of that infamous opening scene trope, "someone gets whacked with a stick at the start of every movie," at an amusement park, and was forced to drink poison.

At the moment she was about to die, a fellow claiming to be a System bound itself to her and told her that, if she wanted to come back to life, she had to complete the main quest: "Live to the age of twenty-one."

So here's the question: How is she supposed to live to twenty-one in a world crawling with murderers, where skyscrapers get blown up as part of everyday life, the seasons have no rhyme or reason, and the timeline is a mess?

And all while she's got the "Accident Magnet" aura activated?

Content warnings:

1. Canon couples will be broken up; the heroine's pairing is undecided.

2. There is a System, and the heroine borrows other people's bodies.

3. Some original characters survive.

Core theme: The way you strive to live is the most beautiful