Okay so, at the very beginning of the game in juno's home, you can go to the right where the stairs are and choose to skip to the new content, but I don't really remember if it keeps some key items like the notes from the skip. when you get out and are able to play again when you skip to the most recent chapter, you'll have to follow a mission or two in order to start up an ending you can get, but when you are in that most recent chapter, you'll have to progress through the story to get the content that has just come out