In this fanfiction, perhaps Keith would be really nervous at first. He might worry about making a good impression on Lance's family. Maybe he'd bring a small but meaningful gift, like a flower from his home planet.
They might have all sorts of adventures. Maybe they go on a family fishing trip and Keith has to learn how to bait a hook, which he's never done before. And Lance's family could be showing Keith all the local hidden gems in their town.
One common theme is friendship. Their relationship often starts as a rivalry but gradually turns into a deep friendship in many fanfictions. For example, in stories like 'From Rivals to Allies', their journey of understanding and supporting each other is the central focus.
A lot of the fanfictions about their kiss also explore the reactions of the other characters in the Voltron team. Some might be supportive, while others could be initially shocked or confused. The kiss can also be a symbol of a new era in the team's dynamics, as Keith and Lance's relationship changes. It can lead to interesting storylines about how the team adapts to this new development.
Teamwork is also a big theme. In many fanfictions, they have to work together as part of a team and their relationship is strengthened through that. And there's the theme of sacrifice, where they might be willing to sacrifice for each other.
One common theme is friendship. Many fanfictions explore how Lance and Keith's friendship evolves over time. For example, they might start off as rivals but gradually become close friends who rely on each other.