It's important to note that 'How to Train Your Dragon: Light Fury' comic porn is not something that should be sought. This kind of content is not only inappropriate but also may have legal consequences for those involved in its search or distribution.
The main distinction of porn with a story genre from regular porn is the presence of a coherent narrative. Regular porn often jumps straight to the sexual action, while the story genre tries to add some kind of story framework around it. But in the end, both are adult-oriented and feature explicit sexual content.
Well, popularity can be quite subjective. If it has a unique plot, engaging characters, and good writing, it could be popular. But it also depends on how well it's been marketed. Some light novels gain a cult following even if they're not mainstream popular. In the case of 'legend of the tyrant empress light novel', we would need to look at factors like how often it's recommended in light novel communities, and if there are any adaptations like manga or anime that could boost its popularity.
Well, it's hard to say for sure. The concept of 'porn-like' is quite subjective. Some might consider certain novels with excessive sexual descriptions as such, but it depends on individual perspectives and cultural standards.
In many places, 18+ porn comics are considered illegal. This is because they can have a negative impact on society and violate moral and legal standards.