These custom-made chapters take place before and after the chapters in Rosalina's Storybook in Super Mario Galaxy. Points in the story and chapters include her time on Earth with her original family, and her time on the observatory after the end of the book. Most chapters take place before the events of the original book, while the epilogue takes place after the last chapter.

When a gamer from the far future is flung back in time to the day Sword Art Online first opened, he, along with a group of scientists and gamers thrown back with them, have the opportunity to stop the original tragedy from ever happening, but they soon learn upon arrival that this task is easier said than done.