The most interesting aspect is the secrecy. Henry has to keep his identity as Kid Danger a secret. So if he's in a love relationship, he has to be careful not to let his secret slip. For example, if he's dating a girl, he might have to come up with excuses for why he disappears suddenly when there's danger in the city. Another aspect is the growth. Henry is a growing character, and as he falls in love, we can see him mature in different ways. He has to balance his superhero duties with his love life, which can lead to some really engaging storylines.
One interesting aspect is the comedic element. Henry Danger is a show full of humor, and a love story within it would be no different. There could be funny misunderstandings, like the girl Henry likes thinking he's flirting with someone else when he's actually just trying to get information for a superhero mission. Also, the dynamic between Henry and his friends when it comes to love is great. His friends might give him really bad or really good advice on how to woo the girl he likes, and that can create a lot of laughter and interesting situations.
In some fanfictions, the 'Love Muffin' aspect could be more of a cutesy, comical thing. Henry and Muffin could be in a relationship where they constantly get into humorous misunderstandings. Like Muffin thinks Henry has forgotten their anniversary when in fact he has planned a big surprise. This type of fanfiction focuses on the lighter, more fun side of their relationship and can be really enjoyable to read.
There could be a love story between Henry and a girl he saves as Kid Danger. Maybe the girl, named Emma, is really impressed by how brave Henry is when he rescues her from a dangerous situation. She starts to visit the store where Henry works (when he's in his normal self) just to catch a glimpse of him. Henry notices her interest and is flattered. They start talking and find out they have a lot in common. Their relationship then blossoms as they get to know each other better.
Henry Danger love fanfic often has a sense of adventure along with the love story. Since the original show has elements of action and adventure, the fanfics incorporate this. So, while the main plot might be about two characters falling in love, they could be doing it while saving the city or dealing with some sort of super - villain. This combination of action and romance makes the fanfics more exciting and unique.
One common theme is the secret identity aspect. Since Henry is Kid Danger, there's often the struggle of hiding his true self from the person he loves. For example, in many stories, he has to come up with excuses when he suddenly has to dash off to save the day.
One popular Henry and Charlotte love fanfiction might be the one where they go on a secret mission together and during that, their feelings for each other start to surface. It's filled with action and their cute banter.
One idea could be a fanfic where Henry has to deal with a new supervillain in Swellview who has the power to manipulate time. This would put Henry in all sorts of tricky situations as he tries to stop the villain while also dealing with the chaos caused by the time alterations. Another idea is a fanfic about Henry's friendship with his sidekicks, like how they handle a really tough mission together and grow closer as a team. Maybe they get stranded on an alien planet during a mission and have to rely on each other to get back home.
You could write a fanfiction where Henry and his sidekick have to face a villain from another dimension. They would need to figure out the new powers and rules of that dimension to defeat the bad guy.
One great 'Henry Danger Love Story Fanfiction' I read was about Henry and Charlotte finally realizing their feelings for each other. It had them going on a secret mission together, and during that time, they shared some really tender moments. It was cute to see how their friendship slowly transformed into something more romantic.
One idea could be that Henry and Charlotte get stuck in a time loop. They keep repeating the same day over and over, and during this time, they discover new things about each other and their relationship deepens. They have to figure out how to break the loop together.
I think Phoebe Thunderman would be really interesting. She's a powerful superhero with a lot of determination. When she meets Henry, she could teach him some new ways to use his powers or they could learn from each other's experiences. Her sassy personality would also create some fun interactions with Henry.