Typically, in such light novels, the main character is often in a situation where they have to deal with the role of a villainess. It usually involves trying to avoid the bad endings that the villainess is supposed to have in the original story, like being defeated or killed. There are often elements of time - travel or reincarnation involved too.
Typically in a 'kill the villainess novel', you'd have the titular villainess. She could be a cruel and powerful figure. Then there's the main character who aims to kill her. This character could be a wronged party, perhaps a former servant of the villainess or someone from a rival family. There may also be other characters like a love interest for the main character who could either help or hinder the mission to kill the villainess, and perhaps a mentor - like figure who gives advice on how to take on the powerful villainess.
In a 'kill the villainess novel', the main plot could be centered around the concept of justice. The protagonist might see the villainess as a source of great evil and decides to end her. There could be a build - up of events that lead to this decision. For example, the villainess might be causing harm to the kingdom or the people in it. The protagonist could be a hero or an anti - hero, and along the way, there may be twists and turns as the story unfolds, such as discovering that the villainess has her own motives or that there is a greater conspiracy at play.
First, you need to come up with a unique and interesting character design for the villainess. Make her have complex motivations and personality traits. Also, think of a captivating plot that keeps readers engaged.
Well, 'A Villainess for the Tyrant' manga is appealing because it offers a fresh take on the typical romance tropes. The world-building is also quite impressive and draws you in.
The main problem might be the struggle to change people's perception or the difficulty in finding true allies. Plus, there's often the burden of living up to the villainous image while still trying to have some depth and complexity.