I'm not entirely sure as it could be a relatively niche or new visual novel. It might be about the character Takane and perhaps a story of love or some sort of relationship (kimekoi can imply something like falling in love).
Well, without more specific information, it's difficult to say precisely. Generally, a visual novel in this context might have a unique art style influenced by manga. The 'Takane' in the title might be the main character or an important aspect of the story. And 'kimekoi' could imply some sort of focused or intense love or attraction within the narrative.
One common theme is friendship. Often, the fanfics start with them as friends and then explore how that friendship might develop into something more. For example, they might face challenges together that strengthen their bond.
I'm not sure specifically as it could be a relatively unknown or new visual novel. It might be about a story of love ('koi' in Japanese means love) and perhaps some sort of journey or development of characters with 'kime' and 'takane' being names or concepts related to the plot.
One possible theme could be friendship, given the mention of 'osananajimi' which means childhood friends. Another theme might be nature, as 'takane no hana' refers to a flower on a high place.
The 'takane no hana to osananajimi visual novel' could potentially be a story centered around a flower on a high peak ('takane no hana') and childhood friends ('osananajimi'). Maybe the flower has some sort of symbolic meaning related to their friendship. It could be a story of how their relationship evolves over time, with the flower being a constant reminder of their shared past or a goal they are both striving towards.
One great place to start looking for Hibiki x Takane fanfics is on Archive of Our Own (AO3). There are many well - written ones there. You can also try Fanfiction.net, though the selection might be a bit more limited. Another option is to ask in relevant fandom groups on social media platforms like Reddit or Tumblr, where fellow fans can recommend their favorite Hibiki x Takane fanfics.
To find the 'manga kimekoi takane visual novel', you might first look at official game stores. If it's a more indie or Japanese - centric visual novel, it could be on platforms that focus on Japanese games. Another option is to search for it on fan - made game repositories, but be careful as the legality and safety of those can be uncertain. You could also try reaching out to visual novel communities or forums to ask for more information.