I'm not extremely familiar with this specific 'yojouhan isekai kouryuu ki novel'. It might be a rather niche or new work in the isekai genre. Maybe it has its own unique storylines, characters and settings that are waiting to be discovered by more readers.
One possible theme could be self - discovery. As the character is transported to a new world, they have to learn about themselves in a different context.
Well, shoujo manga is a genre of manga that focuses on the lives and experiences of young girls. It often has beautiful art, emotional storylines, and explores topics like first love, school life, and self-discovery.
Well, first you need a great story idea that focuses on emotions and relationships. Then, work on creating charming and unique characters. Pay attention to the art style too, making it cute and appealing.
One thing that might make it unique is that it probably doesn't follow the common shoujo tropes. Regular shoujo love stories often have predictable elements like the shy girl and the popular boy. 'Not so shoujo love story fanfic' could be different in that it might have more complex characters or less idealized relationships.
For me, 'Kimi ni Todoke' is up there. The art style is beautiful, and the romance is heartwarming. Also, the characters' growth throughout the story is really engaging.
Shoujo light novels usually have emotional depth. They explore the feelings of the characters in great detail. In 'Fruits Basket', the characters' past traumas and how they deal with them are a big part of the story. The settings are often in a school or a small town, like in 'Ouran High School Host Club' which is set in a high - end private school. And the themes can be quite diverse, from self - discovery as in 'Skip Beat!' to acceptance as in 'Fruits Basket' of one's own and others' flaws.