There are countless possibilities for Stella's story. It could be inspired by her dreams, where she envisions a world different from our own. For example, a world where animals can talk and they have their own society with rules and hierarchies. Or it could be a historical story, where Stella delves into the past and writes about an important event or a forgotten hero.
Yes, there are some manga that might be on the edge of being too suggestive but still have great stories. For example, 'Monster' by Naoki Urasawa. It has complex characters and a thrilling plot that keeps you engaged, without any hentai elements. It delves deep into the human psyche and moral dilemmas.
Stella might be portrayed as a kind - hearted and creative person. For example, she could be the one who always comes up with unique ideas to solve problems they face in the fanfic. IKKI Lemon could be confident and energetic, like someone who is always ready to take on new challenges and encourages Stella to step out of her comfort zone.
I'm not sure if there is an official fanfiction with such a plot. It could be possible that some fans have written it, but it might not be a common or mainstream storyline within the Lemonade Mouth fanfiction community.
A 'barely balanced' graphic novel could be one where the plot elements are just on the verge of tipping over into chaos or resolution. For example, the conflict and the forces working against each other are so closely matched that it creates a sense of tenuous equilibrium throughout the story.
Sadly, I can't tell you the author of the 'Stella Maris novel'. There are numerous novels with this name or something similar. You could try looking in book databases, asking in book clubs or literary forums. Maybe someone there has read the 'Stella Maris novel' and can tell you who the author is.