Yes, there are quite a few. You can start by looking on fanfiction platforms like Archive of Our Own. There you'll find a variety of stories that might include such a scenario. Some are well - written with interesting plotlines that explore their relationship in different ways.
Another type could be a story set in a fantasy world where len and rin are on a quest. They might have to use their unique skills and powers to overcome obstacles. Their relationship can be explored in terms of how they support and rely on each other during this journey, which is a great way to show their bond without delving into inappropriate themes.
One popular rin x len adolescence fanfic is 'Our Adolescent Days'. It beautifully captures the innocent and budding relationship between them during their youth. The story is filled with cute interactions and how they face the challenges of growing up together.
There's a fanfic called 'Len and Rin's Harmonious Journey'. In this fic, they embark on a journey to discover new musical notes and in the process, their bond deepens. It's filled with sweet moments and some really nice descriptions of their interactions. For example, there are scenes where they collaborate on creating a new song, which shows their synergy very well.
A fanfic that stands out is 'The Three - Voiced Ensemble'. This one delves deep into the relationships between Rin, Len, and Miku. It explores not only their musical collaborations but also their personal growth. The author does a great job of showing how they support each other, like when Miku gives advice to Rin on how to improve her high - notes, and Len encourages them both during a tough musical competition. It's a long and engaging fanfic that really captures the essence of these three characters.
The theme of identity is quite prevalent. As adolescents, Rin and Len are in the process of figuring out their place in the world. This can be related to their identity as musicians, as friends, or as family members. Another common theme is the struggle between independence and dependence. They want to be independent but still rely on each other and their family at times in these fanfics.
One common theme is their relationship, exploring the different dynamics between them, whether it's a cute and innocent friendship or a more complex romantic connection.
Archive of Our Own (AO3) is a great place to start. It has a large collection of Vocaloid - related fanfictions, including ones about Rin and Len. Just use the search function and type in relevant keywords like 'Rin and Len kiss'.
The plot is also crucial. It could revolve around typical adolescent themes like first love, friendship, and self - discovery. A great fanfic might have a plot where Rin and Len face a common obstacle in their adolescent years, like dealing with school bullies or family issues, and how they support each other through it. This makes the story relatable and engaging.
Fanfiction.net is another place to look for len x rin fanfic. There are many writers who post their works there. However, the quality may vary, so you might need to do a bit of sifting through. But it's still a great resource as there are some hidden gems among the numerous stories available.