It's mainly about the daily lives and relationships of a group of teenage boys. The story focuses on their friendships, emotions, and experiences growing up.
I'm sorry, I haven't read the 'Sultry Days Shobha De Story' specifically, so I can't summarize it directly. You can try to find some book reviews or synopses online for a quick understanding.
Since I haven't read the 'Sultry Days Shobha De Story', it's difficult to determine the exact main themes. However, given the title, it could potentially revolve around the idea of sultry days which might be symbolic. It could be about the impact of a sultry environment on the characters' lives, relationships, and their own self - discovery. It might also deal with themes of longing, restlessness, or a sense of unease that often comes with hot and humid days. There could be cultural or social themes intertwined as well, depending on the context of the story.
Typically, 'manga de science fiction' often features advanced technology that doesn't exist in our current world. For example, things like flying cars, giant robots, or mind - control devices. It also tends to explore different social structures. Maybe in a future where the Earth is overpopulated, how do people live? And there are often strange new species or mutations. Like in some manga, there are human - like creatures with special powers due to genetic experiments.
I'm not too familiar with 'de shisen manga' to make a direct comparison. But usually, such comparisons depend on factors like art style, storylines, and character development.