One idea could be a story where Sanae is a huge supporter of Captain Tsubasa's football career. She could be the one who encourages him during tough times, like when he has an injury or is facing a difficult opponent. This would add an interesting dynamic to the story as she provides emotional support from the sidelines.
Well, it's hard to say for sure. Sometimes a Touhou comic might stick closely to certain expectations, while in other cases it could take some creative liberties and deviate.
Another theme is discovery. Sanae is often exploring new things about Squid Girl and her world, or vice versa. It could be about new powers, new places, or new emotions. For example, some fanfics might have Sanae discovering a hidden talent of Squid Girl's.
First, you need to understand the characters well. Know their personalities, goals, and relationships in the original story. For Captain Tsubasa, his love for football and his determination are key aspects. Sanae, if she has a kind and supportive nature, that should be emphasized. Then, come up with an interesting plot. It could be something that challenges the characters or makes them grow. For example, a new football tournament with high stakes that they both get involved in.
A common theme is friendship. Since they are both important characters in the series, many fanfictions explore how their friendship develops over time. For instance, they might start off as acquaintances and gradually become best friends through shared experiences.
One good Captain Tsubasa Sanae fanfic could be 'Sanae's Dream Run'. It might focus on Sanae's journey in the football world, her growth as a character, and her relationships with other characters from the series. It could have exciting match descriptions and her emotional development throughout the story.
In my opinion, the story of Flandre Scarlet is also a great one in the Touhou series. Flandre is a powerful vampire who has been locked away for a long time. Her story is about her isolation, her struggle with her own power, and her attempts to interact with the outside world. It shows her complex personality, from her child - like innocence to her terrifying strength when provoked. This contrast makes her story very engaging.
Well, start by familiarizing yourself with the Touhou characters and their backstories. Then, plan out a simple storyline that fits the Touhou universe.
There's a 'akio and sanae fanfic' titled 'The Encounter of Akio and Sanae'. In this fic, they meet in an unexpected situation, like at a mysterious old library. The author beautifully describes their initial awkwardness and then the development of their relationship.