Shower thought for a plot for a squid game fanfic.
What if our main protagonist is a neglected eldest child in the family, he gave up from his dreams because of the lack of money. His mother focuses more on his younger sister because according to her M/n is 'disappointment'. A man approached him in the train on the way home. After some arguments... He accidentally killed his mother, leaving him no choice but to flee away from his home. He decided to dial the number as his last resort, he could win to cover up the mess he did. His sister was trying to report him, saying that he left a card on his bed, unbeknownst to her, a certain cop was listening in.
So we follow M/n and his attempt to flee from his crime and win the game.
(also he has player 120 as his mother figure)
Idk if I'll add ships or what since M/n is kinda young