Friendship is a very common theme. They are often depicted as good friends who support each other through various situations. Another theme is musical collaboration, since they are both Vocaloids associated with music.
One popular Vocaloid Kaito x Len fanfic is 'The Melodic Bond'. It beautifully portrays their relationship in a fantasy world where they collaborate on a magical musical journey. Another great one is 'Frozen Melodies' which delves into their emotional connection through a series of challenges they face together.
One great fanfic is 'A Melodic Encounter'. It beautifully portrays the relationship between Len and Miku. The story has a magical setting where their voices combine to create a new world. It's full of sweet moments and the writing style is really engaging.
You could try looking on Archive of Our Own (AO3). There are often many well - written Vocaloid fanfics there. Just search for 'Kaito x Gakupo' and you'll likely find some interesting ones.
One common theme is music. Since they are Vocaloid characters, music often plays a central role in the fanfics. It can be about them creating music together, or how music brings them closer.
Another theme is the exploration of their digital existence. Some fanfictions delve into what it means for them to be digital entities in a world that is mostly physical. They might face challenges related to their digital nature, such as glitches or the threat of deletion, while also trying to maintain their relationship.
Love is a very common theme. Writers often explore the different aspects of their relationship, from the initial attraction to a deep and abiding love. For example, in many fanfictions, Len and Luka might start as friends who gradually realize their feelings for each other.
One interesting fanfiction could be about Miku and Len going on a magical adventure through different music dimensions. In this story, they might encounter various musical creatures and have to use their voices to solve puzzles and overcome obstacles.
Friendship is also quite prevalent. Their unique connection as Vocaloids can be seen as a strong friendship in many stories. They support each other, have fun together, and grow together through their experiences.
Yes, there are some. You can check out websites like Archive of Our Own. There you might find various fanfictions about them. Some might focus on their friendship, while others could explore more creative scenarios.