One possible plot could be that Emi and Nozomi are in a school setting. They start off as strangers but are paired for a project. As they work together, they discover they have a lot in common, like their love for art. They face some challenges from other students who are jealous of their budding friendship, but in the end, they become best friends and support each other's dreams.
One common theme is friendship. Since Nozomi is part of a group, many fanfics explore her deep bonds with the other members. For example, stories might show how she supports her friends during tough times in their idol careers.
One common theme is friendship turning into something more. Since they are friends in the original series, fanfiction often explores the idea of their relationship evolving romantically.
It could also be through conflict. Suppose Emi accidentally ruins Nozomi's important project. Nozomi is initially angry, but as they work to fix the situation, they understand each other better. Emi realizes how much the project meant to Nozomi, and Nozomi sees Emi's good intentions. This event becomes a turning point in their relationship, making it stronger.
Some themes that are often seen in nozomi x elaichi fanfic are those of transformation. For example, they could transform in some way, either physically or in terms of their personalities, and how they deal with that change together. Another theme is that of mentorship. One could be a mentor to the other, guiding them through difficult situations. There can also be a theme of celebration, like celebrating a festival together and the experiences they have during that time.
Some of the best nozomi x maki fanfiction can be found on Archive of Our Own (AO3) as well. It has a large collection of fan - created works. You might want to look for stories with high ratings and a lot of kudos, which usually indicate good quality.
One popular 'love live nozomi fanfic' is 'Nozomi's Dream Journey'. It explores Nozomi's character in a new light, showing her determination and her relationships with the other members in a really engaging way.
You can also ask in fan communities dedicated to the source material of eri and nozomi. Fans there might be able to recommend some great non - lemon fanfics. Maybe there are some stories that explore their backstories together, or how they help each other through difficult times. These kinds of fanfics can be really interesting and engaging without any inappropriate content.
Since lemon fanfics usually contain adult - like content which is not suitable to promote, I would suggest you search for regular eri x nozomi fanfics. Try using tags on platforms such as FanFiction.net. You might find some great stories that focus on their friendship, adventures or emotional bond without any improper elements.
You can try fanfic websites like Archive of Our Own. It has a large collection of fan - created works, and there's a good chance you'll find some great nozomi x elaichi fanfic there.