First: at this current date, I consider it to be Fujimoto's best work, and that reinforces that the man still has a lot to get even better, bringing a new series after CSM or even more one-shots.
Among several points to be mentioned about the manga, the central plan of the plot is the question of the need or not-need to separate fiction and reality, because in several points of the plot this is simply irrelevant.
At the beginning, in the INTRODUCTORY part, we can already see that they make a tremendous mess of the protagonist - both his parents and his classmates - and this is where the spoilers come in.
He meets Eri, the girl who gives the title of the one-shot, a beautiful girl who is interested in his film, because it is something unique. Later we see that it wasn't just that, she liked it because she felt personally affected, since she was also on the march towards death, as evidenced in a scene of them watching the film and her identifying with the character who dies at the end; Fujimoto is constantly drawing this parallel between the movies they're watching, the movie they're producing, and the manga the reader (you) is reading, and that's what makes it fantastic.
The scene of Yuta's father failing the film about Eri, her lines about death, our discovery of her disease and only later our break in perspective when we learn that she always wore glasses and dental braces, with her already dead, all this information makes us question what is real from the perspective of the characters, and this becomes less and less easy to know every page, since we don't know if what happens at the end was real or not. It might have been, it might not have been.
With that, I can say that yes, they managed to produce a great film.
