Ok, if they burn it - how does the next group get to experience the same thing then? We know its not an illussion because it was drawn, but if it was drawn... Did she make a hundred paintings?
People might be angry at editors many times saying that they stop authors from doing what they truly want, but let this be a reminder that editors usually do their job properly to fix things since some authors are completely blind to their faults.
30K years and you still haven't made a move. This is the hardest thing to swallow from this manga.
A man and a woman that love each other and have been together for 30K years without doing it? More unrealistic than magic, now that is science fiction.