One common theme is the exploration of unrequited love. Often, either Nana or Igarashi might be pining for the other while thinking their feelings are not reciprocated. This creates a lot of tension and drama in the fanfics.
One popular 'kiss him not me nana x igarashi fanfic' could be 'A Chance Encounter'. It focuses on the unique relationship between Nana and Igarashi, with some really sweet and awkward moments that are very true to their characters in the original work.
One common theme is friendship development. It could show how their relationship evolves from acquaintances to really good friends. Another theme might be adventure, where they go on some sort of journey together.
One popular 'nana x nana fanfic' story could be about their adventures in a new city together. They might discover new music and bond over it, exploring the local music scene.
First, understand the characters well. Know their personalities, dreams, and fears. For the 'nana x nana' pairing, it's important to capture their unique bond.
You can try looking on fanfiction websites like Archive of Our Own (AO3). There are often a lot of works related to different pairings there. Just use the search function and type in 'igarashi x nanashima' to find relevant fanfictions.
Growth is also common. Momo might help Nana become more open - minded, or Nana could teach Momo about responsibility. In some fanfics, this growth is shown through their shared experiences, like facing a difficult situation together which forces them to step out of their comfort zones and change for the better.
One popular momo x nana fanfic is 'The Unlikely Bond'. It focuses on how Momo and Nana, two very different characters, gradually form a deep friendship. Their interactions are well - written, showing how they support each other through various challenges.
One common theme could be friendship. Since Momo and Nana are both characters from the same series, their relationship might be explored in terms of friendship in the fanfics.