I'm not entirely sure specifically what the 'cero essence anime story' is about as it's not a widely known common title. It could be a very niche or self - created anime concept.
In many anime stories, Cero Essence could be acquired through interactions with powerful characters or by uncovering hidden locations. Sometimes, it requires solving complex puzzles or fulfilling certain conditions related to the plot.
Since we know so little about the 'cero essence anime story', it's difficult to say who the main characters might be. However, in most anime, there are characters who are central to the plot because of their relation to the main concept. So in this case, if the 'cero essence' is important, there might be a character who discovers it, or perhaps a character who is born with it. There could also be antagonists who want to use the 'cero essence' for their own malicious purposes.
In many cases, visual novels are indeed rated by CERO. CERO provides a standardized rating system to determine the suitability of the content for different age groups based on various factors like violence, sexual content, and themes.
The story 'The Woman' by Zona Gale might explore the character of the woman in depth. It could be about her struggles, her relationships, or her place in society. Maybe it shows her journey of self - discovery or how she copes with the expectations placed on her.
The main differences could lie in the way the story is presented visually, or maybe in some character developments. Sometimes the anime might add or omit certain plot points for better pacing or to suit the animation format. However, it's hard to say exactly without specific details about the 'ooh la la manga'.
I'm not entirely sure who Stevan Sremac and Zona Zamfirova specifically are in English novels as they may be relatively unknown or specific to certain niche literary works. It could be that they are characters created by an author not widely known in the English - speaking mainstream, or they could be figures from translations of works from another language where their significance is more prominent in the original cultural context.