I'm not sure specifically as there could be many different plots in fanfictions with this title. It might involve Naruto receiving some special power or protection from the Tsukuyomi. Maybe it could be about Naruto being in a unique situation where the Tsukuyomi's influence changes his fate in the Naruto universe.
In fanfics about Naruto's Infinite Tsukuyomi dreams, often the authors explore the deepest desires and fears of the characters. For example, Naruto might dream of a world where there is true and lasting peace in the ninja world, with all the villages united. This could show his innermost longing which is usually overshadowed by his daily battles and struggles.
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.
Since it's a Naruto - related fanfiction, Naruto himself is most likely one of the main characters. And considering it involves Tsukuyomi, perhaps the one who wields the Tsukuyomi, like Itachi Uchiha, could also be a main character or at least play a significant role.
I'm not entirely sure specifically as 'lemon' in fanfiction often implies some inappropriate content. But generally, in the context of Naruto and the Infinite Tsukuyomi, a fanfiction might explore the alternate scenarios within that world. Maybe it could be about how different characters are affected by the Infinite Tsukuyomi in ways not shown in the original series.
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.
There's a fanfiction titled 'Tsukasa and the Mysterious Object'. In this story, Tsukasa stumbles upon a strange object and her curious nature leads her on an adventure. It's full of humor and the interactions between Tsukasa and the other characters are really well - written.