One common theme is friendship exploration. Since they are classmates in the original series, fanfictions often explore how their friendship could develop deeper into a more meaningful relationship.
Adventure themes are also popular. They could be on a mission together, relying on each other's quirks to get through dangerous situations. This kind of situation often brings them closer and leads to romantic feelings. Like, Tokoyami's Dark Shadow could help protect Tsuyu in a fight against villains, and that act of heroism could make Tsuyu see him in a new light.
One common theme is the exploration of their contrasting personalities. Tsuyu is more down - to - earth and friendly, while Tokoyami is a bit more brooding. So, fics might focus on how they complement each other.
You can try fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions, and you can search for 'Tokoyami x Tsuyu' there. Many talented writers share their works on it.
A plot could also revolve around a school event, like a festival. Tsuyu and Tokoyami are both involved in different aspects of the festival preparations. They keep crossing paths and helping each other out. As the festival progresses, there's a beautiful moment under the stars or in a quiet corner of the festival grounds. They've been developing feelings for each other throughout the day, and finally, they share a kiss. This type of plot would be more light - hearted and sweet, showing the growth of their relationship in a more everyday - like setting.
Fanfiction.net is also a great place to look. However, the quality may vary. Some stories might be really well - written, while others may need some improvement. Just be sure to read the reviews and summaries to find the ones that seem interesting to you.
One idea could be that they are paired for a difficult hero training mission. Tokoyami's dark powers and Tsuyu's unique abilities would have to work in harmony. Maybe they get trapped in an area where Tokoyami's darkness actually helps them hide from a powerful enemy, while Tsuyu uses her long tongue to reach for resources or communicate with allies outside the area.
Tokoyami is often a bit brooding and serious. In the fanfiction, he could open up more because of Tsuyu's laid - back and friendly nature. Tsuyu, on the other hand, could become more confident in her decision - making when she sees how Tokoyami is so decisive. For example, when facing a difficult choice during a battle, she might remember how Tokoyami would act.
There are quite a few out there. You can check some fanfiction platforms like Archive of Our Own. Just search for 'Tsuyu and Tokoyami kiss' in the search bar, and you'll likely find some interesting reads. Some might focus on a romantic moment during a battle where they share a kiss as a sign of their deep connection.