Well, without more information about this 'sayonara novel', it's hard to say precisely. It could be a coming - of - age story where the main character has to say goodbye to their childhood innocence or a group of friends. It might also be a love story where two lovers part ways and the novel explores the pain and growth that follows this separation.
Sayonara fanfic could refer to fan - created fictional works that are related to the concept of 'sayonara' which means goodbye in Japanese. It might be fanfictions that deal with themes of parting, endings, or characters saying goodbye in a particular fictional universe.
I'm not sure of specific'sayonara fanfic' examples off - hand. But it could be like a Harry Potter fanfic where a character decides to leave Hogwarts for good and there are a lot of emotional goodbyes with friends and professors. It would be a story centered around that parting moment.
I'm not entirely sure as I haven't read it in detail. But generally, it might be about piano sonatas and perhaps some kind of emotional story related to music, like a pianist's journey, the beauty and power of piano music, and relationships that are intertwined with the creation or performance of piano sonatas.
I'm not sure who the main characters are without reading the 'bystander light novel'. But it could be the bystander themselves, or perhaps someone they are observing.
One special thing about the 'bystander light novel' could be its exploration of themes like observation, non - involvement, and how a bystander's thoughts and feelings can be a crucial part of the narrative. It might show how a bystander can influence a situation without directly participating in it. For example, their internal monologues could shape the mood of the story. Also, the character development of the bystander might be interesting as they gradually change from just observing to perhaps taking some form of action.
In some 'bystander graphic novels', there could be a group of characters where one is singled out as the bystander. The others might be involved in various actions or situations that the bystander witnesses. For example, there could be a protagonist who is constantly in trouble and the bystander is someone who has the choice to help or not.
The 'bystander graphic novel' might have unique art styles. It could tell stories in a very visual and engaging way that text - only novels can't. For example, the use of panels and illustrations can create a more immersive experience for the reader.