you're right! my interpretation is in the ending scene she talks about how you'll meet people that you never expected to see again and the laptop shows jihyeons song indicting the people sitting at that table were her friends from the story. it also mentions in the epilogue mihuis family IN the real world and how they don't remember the novel and only mihui does supporting the fact they all are in the real world. green haired girl is in a story made by the group in which she made a deal with the devil to get out of to reunite with the rest of the group (finally understanding they truly did care about her).
yes every single character left the novel but only the friends and those directly involved with the main characters remember everything while their families forgot. Green haired girl also left the original novel but instead of moving to the real world moved to another story
I'm so confused, I love rina and minwoo but was minwoo also able to leave for the real world? considering the story did say that they all left or something? or are both rina and minwoo still in the novel world? and only jinyoung (i forgot the name I think but the brown haired dude) left for the real world?
Edit: nevermind I think in the authors note it said everyone left the world although it took some time but the green haired girly was transferred to another story instead of moving to the real world ig? idk if I got it right