I'm not entirely sure as I haven't specifically read this visual novel. But generally, a visual novel is a form of digital storytelling that combines text, images, and sometimes audio. 'Cuffed together' might imply a plot where characters are bound or connected in some way, perhaps in a mystery or adventure scenario.
One such visual novel could be 'The Captive Hearts'. In this story, the main characters find themselves cuffed together due to a mysterious circumstance.
Since I don't know this visual novel well, I can't say for sure who the main characters are. But usually, in a story about being 'cuffed together', there might be characters who are polar opposites, like a criminal and a detective who end up cuffed for some strange reason.
All Might and Shigaraki. It would be really interesting to see the symbol of peace cuffed to the main villain's apprentice. All Might could try to influence Shigaraki and show him a different path, while Shigaraki would be in a position where he has to face the hero he's been taught to hate up close.
A new trainer and a legendary Pokemon. Imagine a young trainer who accidentally cuffs themselves to a powerful and mysterious legendary Pokemon. The trainer has to figure out how to communicate with the Pokemon and gain its trust while they are literally bound together. This would be a great opportunity for character growth for both the trainer and the Pokemon.
One possible plot could be that the Powerpuff Girls Z are cuffed together by some villain's new device. They have to work together in a more restricted way to fight crime. Maybe they struggle at first with the lack of individual movement but then learn to combine their powers even more effectively in this new situation.
One idea could be that two rival Pokemon trainers are cuffed together by a mischievous Pokemon. They have to learn to work together to escape and in the process, they discover new things about each other's training styles. For example, one trainer might be more focused on attack power while the other on defense. Through this forced cooperation, they might even combine their strategies to create a new and powerful way of battling.
One great fanfiction with Aang and Katara cuffed together could be one where they are in a situation forced by some villains. They have to rely on their unique bending abilities and their strong bond. For example, Aang's airbending could be used to try and break the cuffs or at least make it difficult for the captors to move them around easily. Katara's waterbending could also come in handy for various things like creating distractions or even trying to freeze the cuffs. There are often fanfictions that explore their relationship deeper in such a situation, with them having heart - to - heart conversations while trying to escape.
Another possible theme is self - discovery. The characters may learn new things about themselves or each other while being in this unique 'cuffed together' situation. It could force them to confront their fears, weaknesses, or hidden strengths, and this journey of self - discovery can be a central part of the fanfiction.
It's possible that being cuffed together could actually enhance their powers in some ways. They are forced to be in closer proximity to each other, which could lead to a stronger connection between them. This might mean that when they use their powers together, like when they do the Powerpuff Girls Z combined energy blast, it could be even more powerful. But on the flip side, it could also make it harder for them to use their individual powers for specific tasks that require more precision.