I really like 'Tim and Cassie: Growing Bonds'. In this fanfic, it starts with them having a bit of a misunderstanding which is really relatable. Then as the story progresses, they start to understand each other better and their friendship evolves into something more. It has some really great dialogue that makes the characters come alive.
I'm not sure specifically about 'lemon' fanfics as they often involve inappropriate or adult - themed content which is not suitable. However, there are many great fanfics about Tim Drake and Cassie Sandsmark that focus on their relationship in a more appropriate way. You can try searching on fanfic platforms like Archive of Our Own and filter for the Teen and up rating.
Another option is Tumblr. There are often fanfic recs (recommendations) on Tumblr. Some blogs are dedicated to sharing great fanfictions, and you might be able to find some good Tim Drake and Cassie Sandsmark fanfictions through those blogs. Just search for relevant tags like #TimDrake #CassieSandsmark #Fanfiction.
Archive of Our Own is a great place to start. It has a wide range of fanfics, and you can use the rating and filtering system to exclude any adult - themed stories. You can search specifically for Tim Drake and Cassie Sandsmark, and then select the Teen and up or General Audiences ratings.
Popular tropes in their fanfiction include the 'rivalry - turned - friendship - or - more' trope. They might start off as rivals, competing in some aspect like who can solve a mystery faster or who is a better fighter. As the story progresses, this rivalry turns into a strong friendship or a romantic relationship. The 'in - over - their - heads' trope is also seen often. They get involved in a situation that is far more dangerous or complex than they initially thought, and they have to rely on each other to get out of it.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can simply search for 'Cassi Sandsmark and Tim Drake' in the search bar. Another option is FanFiction.net, though the content there might vary in quality. Some Tumblr blogs also share and recommend good fanfictions related to them.
The plot could involve them starting as rivals. For example, they might be on opposite sides in a battle or competition, but then gradually realize they have more in common than they thought and become friends or even allies.
There should be non - adult Cassie Drake fanfiction. Many fans enjoy creating and sharing stories that focus on different aspects of the character without including adult themes. You might find stories about her friendships, her role in a fictional world, or her growth as a character. These can be found on various fanfiction sites by filtering for appropriate content.
In fanfiction, Tim Drake whimpering can be a powerful device for character development. It might be the starting point for his growth. For instance, he could start as a whimpering mess in a situation but then find the strength within himself to overcome it. This transformation can be very engaging for readers and make the fanfiction more interesting.