Perhaps a plot where an outside force tries to manipulate Hei and Yin's relationship. They have to figure out who is behind it and in the process, they learn more about their own feelings for each other. This could involve some intense action scenes as they are constantly under attack while trying to solve the mystery.
One idea could be exploring Hei's past in more detail. Maybe a story where he has to face a threat from his old organization that forces him to remember things he'd rather forget. Another could be a fanfiction where Hei teams up with an unexpected ally, like a character from a different anime universe, to solve a mystery in the Darker than Black world.
One idea could be a story where Hei has to protect Misaki from a new, powerful enemy that is after her because of her knowledge of Contractors. This would put them in a lot of dangerous situations and force them to rely on each other more than ever.
A plot idea could be that there is a strange phenomenon affecting Contractors and Dolls, and Misaki and Hei are the only ones who seem to be immune at first. They then have to investigate the cause while also dealing with the suspicion and fear from others in their respective communities. As they dig deeper, they find out that it has something to do with an ancient and forgotten power that is starting to resurface.
The unique world - building of the original work also contributes. The concept of Contractors and their powers is fascinating. Fanfiction can play around with these powers, creating new power combinations or exploring the limits of existing ones. For example, a fanfic could show a Contractor with a never - seen - before power and how it affects the balance in the 'Darker than Black' world.
Well, in many Hei and Yin fanfictions, the authors play around with their abilities. For example, they might create scenarios where Yin's Contractors' powers interact in unique ways with Hei's powers. It makes for some really interesting reading as it shows different perspectives on their characters.
Fanfiction about 'Darker than Black: Yin and Hei' can explore various aspects. It might focus on character development, such as delving deeper into the pasts of Hei and Yin. For example, a fanfic could explore how Hei's experiences in the past shaped his current personality and actions in the series.
Their relationship can be developed by having them share more personal experiences. For example, they could talk about their past traumas and how they've coped. This would create a deeper emotional connection.
Sometimes, you can also find them on specialized anime fanfiction forums. These forums might not have as large a collection as the big websites, but they often have some unique and high - quality fanfictions written by die - hard fans of the series. You might need to register on some of these forums to access the fanfictions though.
A plotline could involve Hei and November 11 getting stranded in a strange and dangerous place. They have to use their skills and wits to survive and find a way back. This could show a different side of their relationship as they depend on each other more than ever.
One possible fanfiction could be about Hei and November 11 teaming up for a dangerous mission. They might face challenges that test their loyalty to each other and the organization they work for. For example, they could be sent to infiltrate an enemy base where they have to rely on each other's unique abilities to succeed.