Well, 'senku x tsukasa fanfic' like 'The Path of Understanding' is really good. It starts with their initial clashes and then gradually develops into a story of mutual respect. 'Shared Visions' is also great as it imagines a scenario where they both have to combine their skills for a common goal. And 'Hidden Depths' reveals the more complex aspects of their relationship through various events in the story.
First, study the characters of Senku and Tsukasa. Know their personalities, goals, and what makes them tick. Then, come up with an interesting plot. It could be something like them going on a quest together or facing a new threat. Also, focus on their relationship dynamic, whether it's a friendship, rivalry, or something in between.
Well, there could be several ways. It could be that they are part of the same community or group. Or perhaps there's a mystery or adventure that forces them to interact and thus, Ruri gets to know Senku. Maybe it's all part of a complex web of relationships that unfolds as the manga progresses.
There could be a fanfiction where Tsukushi and Tsukasa are expecting a child. It might explore how they prepare for the new arrival. For example, they could be shown shopping for baby clothes and setting up a nursery. The story could also delve into their emotions, like Tsukushi's excitement and Tsukasa's nervousness about becoming parents.
One great 'senku x gen fanfic' could be 'The Adventure Beyond Stones'. It takes their unique relationship and puts them in a new, exciting situation where they have to work together to overcome a strange new threat in their primitive world. It's full of action and the banter between them is really well - written.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, and there's a good chance you'll find some great anzai and tsukasa fanfics there.
Another theme can be personal growth. In many fanfics, both Tsukasa and Tsukushi might face difficulties that force them to grow and change. They support each other during this process, which is a great aspect of these stories. For example, Tsukasa might be shy at first but becomes more confident with Tsukushi's encouragement. Tsukushi, on the other hand, might learn to be more patient or understanding through their relationship.
Often, you'll see themes related to self - discovery. Tsukasa and Tsukushi might be on a journey to understand themselves better while being in the relationship. Also, there are fanfics that focus on the power dynamics between them, as they might have different social standings in the original story. This creates an interesting dynamic in the fan - created stories.