The thing that makes a 'dirty affair' fanfic compelling is the element of risk and the forbidden nature of the relationship. It also depends on how well the author develops the characters' emotions and the build-up of the story.
Well, without more context, it's hard to say exactly. 'A dirty affair' gives the impression of a somewhat improper or secretive relationship. In a fanfic, it could be about characters from a show, movie, or book getting involved in a relationship that goes against the norms of that fictional world. It could be full of drama, secrets, and unexpected twists.
Well, a good secret affair novel often has complex characters with conflicting emotions. Also, the element of risk and the threat of discovery add excitement. Plus, a well-developed plot that keeps you guessing about the outcome.
It might be the element of surprise and mystery. You never know how things will unfold and that keeps you hooked.
The element of adventure and the unknown usually makes it compelling. You never know what kind of crazy situations the characters will get into.
It usually has relatable characters and complex relationships that draw you in. The drama and emotions within the family keep you hooked.
A novel about dirty money can be compelling when it shows the complex web of criminal activities involved. The moral dilemmas faced by the characters and the high stakes involved keep readers on the edge of their seats. Also, if it has unexpected plot twists and reveals, that makes it even more engaging.
People who like complex relationship dramas in the context of their favorite fictional universes might be interested.
The risk factor. In a dangerous love affair fanfic, the characters are often in situations where their love is not accepted or is against some rules. This makes the readers wonder how they will overcome these obstacles.
The mix of emotions and unexpected plot twists. A bittersweet potion fanfic keeps you engaged by making you feel both happy and sad at the same time, with surprises along the way.
A good 'dead world' fanfic usually has unique characters and a captivating plot. Maybe it shows how survivors cope or explores the mystery of what caused the world to die.