In many Servamp fanfictions where Mahiru is kidnapped, it often leads to a series of intense and emotional events. His friends in the Servamp world would surely be in a panic. Kuro, for example, would likely be extremely angry and determined to rescue him. He would use his powers to track Mahiru down. Maybe he'd team up with other Servamps or their Eves to form a search party. The kidnappers could be some old enemies who want to use Mahiru as a bargaining chip against the Servamps.
Another fanfiction worth checking out is 'In the Shadows of Lawless and Licht'. This one focuses more on the emotional side of their relationship. It shows how Licht's past experiences influence his interactions with Lawless, and how Lawless, with his carefree nature, gradually breaks down Licht's barriers. The story is filled with tender moments and emotional depth.
In my opinion, 'Servamp' has a happy ending. The story concludes with resolutions for the main conflicts and the characters' relationships develop positively. But, like many endings, it's open to interpretation and different readers might have different feelings about it.
Sure, there are great Servamp Licht x Lawless fanfictions. These fanfictions can vary widely. Some might be set in alternate universes where their roles are different. For example, one might imagine a modern - day high - school AU where Licht is the studious student and Lawless is the rebellious troublemaker. Their interactions in these new settings can be really engaging and offer fresh perspectives on their relationship.
Power struggles are also common. The male oc may find himself in the middle of battles between different Servamps or between Servamps and their enemies. He has to decide which side to take and how to use his powers (if he has any) to survive and make a difference. For instance, he could be caught between Tsubaki's chaos - causing plans and the other Servamps' attempts to maintain order.
One common theme is the supernatural bond. Since Kuro is a servamp, there are often stories about the special connection between him and the reader. For example, the reader might be able to sense Kuro's emotions or powers in a unique way. Another theme is the idea of protection. Kuro being a powerful being, he often protects the reader from various threats in the fanfiction.
Love and acceptance are also big themes. Kuro has his own insecurities and past traumas, and Mahiru's unconditional acceptance of him is a key part of their relationship. Fanfictions might expand on this, showing how their love helps Kuro heal. Additionally, the theme of power and control can be explored, as Mahiru is Kuro's master in a sense, but their relationship is much more complex than a simple master - servant dynamic.
The theme of trust also frequently appears. Given their different natures, it takes time for them to trust each other. Fanfictions will show the journey of building that trust, whether it's through shared secrets, facing danger together, or simply spending time together and getting to know each other on a deeper level. It's a slow and often complicated process that makes for interesting reading.
You could also try Fanfiction.net. It has been around for a long time and has a good number of Servamp fanfictions. However, the tagging system might not be as refined as AO3, so you may need to do a bit more sifting through the results to find the Licht x Lawless ones.