Often, in such novels, the undercover status adds an element of suspense. The hero could be working for a secret agency and hiding his true identity from the heroine to keep her safe. It could also lead to misunderstandings and challenges in their relationship.
The hero might grovel by genuinely realizing his mistakes, expressing deep remorse, and taking concrete actions to make amends. He shows a sincere change in behavior and attitude towards the heroine.
One common theme is the conflict between duty and love. The hero is usually on an important undercover mission, and falling in love can put that mission at risk. Another theme is secrecy. The hero often has to keep his true identity a secret from the heroine, which adds a lot of tension to the relationship.
Sometimes the hero might use his power or influence to make the heroine do what he wants. Maybe he threatens her or manipulates the situation to get her to comply.
The hero often saves the heroine from physical danger, like rescuing her from kidnappers or protecting her in a dangerous situation.
There's 'Undercover Attraction' which is really good. The hero, who is undercover, has to navigate his feelings for the heroine while also staying true to his mission. In this novel, the romantic tension is built up really well as they are thrown together in dangerous and unexpected situations. It's a great read for those who love this genre.
A door ajar in Harry Potter fanfiction can be a plot device. Maybe it's a way for a magical creature to enter or exit, or it could be a part of a puzzle that the characters have to solve to progress in the story.
The novel romance hallmark of 2011 was known for its charming settings, engaging dialogues, and the ability to make readers feel deeply connected to the romantic journey of the characters.
The fanfiction might have Ash receive an Alola variant Pok茅mon as a gift or through a rare event. This could trigger a series of events where he has to learn about the variant's abilities and how to best utilize it. Maybe it even leads him to explore the Alola region more deeply than he originally planned.
The fanfic might show Harry stumbling upon Sylvia Plath's works in the library and getting deeply engrossed.
In some fanfictions, eating a special fruit might give characters unique powers or abilities.