I recommend the book,"The Legend of the Vampire," to you. Although it wasn't a Doujin novel, it included the elements of the pet girl in Cherry Blossom Manor and Cut the Crimson Pupil. It was also a novel of the infinite universe, and the male protagonist, Li Fan, had also transmigrated to a different world. I hope you like my recommendation, Mwah ~๐
The novel " Pet Girl of Sakura Village " did not specify the plot of Mashiro confessing to Sorata because the progress bar of the novel did not show these plots. However, according to the plot of the novel, Kuta and Mashiro became good friends in the third volume and participated in the school's music competition together in the fourth volume. In the fifth volume, Kuta confessed to Mashiro and was rejected.
Often, Lenalee Lee is paired with Kanda Yuu in these fanfictions. She and Kanda Yuu could be involved in projects to help the survivors of the war. Their different personalities, with Kanda Yuu being more brooding and Lenalee being more empathetic, can create interesting dynamics. And there are also fanfictions where he is paired with Bookman, as they might exchange knowledge about the world post - war and how history is being rewritten.
The older light novels show Sorata as a relatable character who is struggling with his own dreams and the reality around him. He has a strong sense of justice and kindness. Mashiro, she stands out not only for her artistic talent but also for her naivete. She doesn't understand social norms well, and Sorata is often there to bridge the gap between her and the outside world. Their relationship in these early novels is full of comical misunderstandings and heartwarming moments as they gradually learn more about each other.
I'm not sure which specific 'older' light novels you mean precisely. However, in general, the light novels related to them often explore themes like friendship, love, and self - discovery. You could look for volumes that were published earlier in the series to get a sense of the initial development of their characters and story.
One possible fanfic could be about Shiina and Sorata's adventures outside of Sakurasou. They could explore the city, discover new art galleries for Shiina to get inspiration from and Sorata could document their experiences in his writing.
Allen Kanda fanfic typically revolves around the characters Allen and Kanda from a particular series. It could be about their relationship, adventures they might have together, or how they interact with other characters in new and fictional scenarios.
Another one could be 'Re:Zero โ Starting Life in Another World'. It's known for its unique take on the isekai genre. The main character has to relive his death over and over again, which creates a lot of tension and interesting plot developments. It also has a diverse cast of characters that add depth to the story.
One great Chibi Kanda Yuu fanfic is 'The Adventures of Chibi Kanda'. It's really cute as it shows Kanda in a more child - like and innocent state. The author does a wonderful job of portraying his character traits in a chibi form.
One great 'allen x kanda fanfic' is 'The Bond Beyond Duty'. It beautifully explores their complex relationship. It shows how their interactions gradually change from just comrades to something deeper. The author does a wonderful job of depicting their individual personalities within the story.