Well, first you need to have a clear idea of what you want to model. Then, choose the right software like Blender or Maya. Start with simple shapes and build up from there.
It usually features exaggerated and often inappropriate depictions of female characters. The storylines might be focused on fantasy or unconventional themes.
Well, to make a 'hentai 3d visual novel', you start with the basics. You need to design your 3D characters with appropriate software. For the story, it should be well - thought - out and match the theme of the game. Regarding the visual aspect, you have to pay attention to details like lighting and textures. But remember, this is a very specialized and often controversial area of game creation due to the nature of 'hentai' content.
I think she should first understand the main plot and themes of the original manga. Then, she could come up with creative ways to make the story more engaging and appropriate for the target audience.
Such pornographic comics are often characterized by explicit and inappropriate imagery. But we should avoid engaging with or promoting such content as it can be harmful and against ethical standards.