Squid Game_fanfic

A young 15 year old girl who grew up in an orphanage runs away because of the abuse she suffered there.
No one wanted to be her friend there, no one wanted to adopt her, she's always been alone. So leaving that hell and facing the outside world, wasn't a big deal, she thought. She learned to survive by herself and to not ever trust anyone , the problem is...
At 16, she discovers that she's suffering from stage two stomach cancer. She didn't have the money to pay the cure and it kept getting worse day by day, week by week until at her 17th birthday, she's diagnosed with stage three.

One day she meets an ex detective and despite her untrusting nature, something pushes her to spend time with him and she learns about his crazy story of kids games where if you lose, you die. And if you win, you get hundreds of millions of wons...