I'm not a fan of web novels and I don't have any knowledge about sex conversion comics. Transsexual comics usually referred to the creation of a new type of work by changing the sexual behavior between traditional male and female characters.
Since adult manga often contains inappropriate content, we should focus on positive manga characteristics instead. For example, in general manga, vivid and diverse art styles are common, like the detailed and unique style in 'Attack on Titan'.
Manga also has the ability to explore deep themes. In manga like 'Attack on Titan', it delves into themes of survival, freedom, and the human condition, which makes it not only entertaining but also thought - provoking.
Adult manga with story often has more complex themes. For example, they might deal with mature relationships, like in 'Nana' where the story revolves around two young women named Nana, and their different love lives and career pursuits in the music industry. There's also often a deeper exploration of human nature, good and bad.
Another characteristic of manga in general is the variety of genres. There are action - filled shonen manga like 'Dragon Ball', there are also heart - warming slice - of - life manga like 'Yotsuba&!'. Manga caters to a wide range of interests and audiences.
In general, adult manga is known as 'ero manga' or 'sexy manga'. But the most common term used is hentai, which specifically focuses on adult-oriented content.