It's very missable without a guide. In my first run, I didn't talk to the two Flumylym at the fish soup restaurant, but you can replay any chapter from the start menu using the load option and replay chapter 4.2 again. You might need to replay the epilogue again as the notes will not appear. However, the developers are working on a batch for this and the missing notes not popping up.
Aw man I literally only missed talking to Chris that's annoying.
It's very missable without a guide. In my first run, I didn't talk to the two Flumylym at the fish soup restaurant, but you can replay any chapter from the start menu using the load option and replay chapter 4.2 again. You might need to replay the epilogue again as the notes will not appear. However, the developers are working on a batch for this and the missing notes not popping up.