Another approach is to write a fanfic where Shin and the heroine are in a different time period. For example, a historical setting. This would change their dynamic and offer new storylines to explore.
A simple plot could be that the heroine loses her memory instead of Shin this time. Shin has to help her remember who she is and in the process, they fall even more in love.
One popular 'amnesia shin and heroine fanfic' is 'The Forgotten Promise'. It beautifully explores the relationship between Shin and the heroine after she experiences amnesia. The story is filled with emotional moments and a slow - building romance.
Well, there might be a fanfic where the heroine's amnesia is a result of some sort of accident. In this story, Shin is determined to make her fall in love with him all over again. He shows her all the things she used to love, like her favorite books or music. As she slowly recovers bits of her memory, their relationship deepens in a new and interesting way.
First, focus on the characters. Understand Shin's personality and how he would react to the heroine having amnesia. Then, plan out the plot. You could start with the moment the heroine loses her memory and how Shin discovers it. For example, you might write that she wakes up one day and looks at Shin with confusion. Keep in mind the emotions involved, like Shin's shock and worry.
Another theme is the mystery of the past. As the heroine tries to remember, there are often secrets and hidden events from their past that start to surface. This adds an element of suspense to the fanfiction. For example, there might be a reason why she lost her memory in the first place that is related to some past event between them. Also, the theme of self - discovery for the heroine is quite common. Through her journey of regaining her memory, she also discovers new things about herself and her feelings for Shin.
First, outline the cause of the heroine's amnesia. It could be a medical condition, an accident, or something magical. Then, think about how Shin will react. Will he be protective? Confused? Next, plan the heroine's journey of rediscovering herself. Include details like her new reactions to things she used to know. Also, add some conflict, like someone trying to take advantage of her amnesia.
Well, there's 'Amnesia's Echo' which is also quite good. In this fanfiction, the heroine's amnesia creates a lot of misunderstandings between her and Shin. But as the story progresses, they start to communicate better and slowly, the heroine begins to regain some of her memories. It's a story full of twists and turns.
I've read a fanfic that focuses on Ukyo and the heroine during a festival. They participate in various games and activities, and there are some really cute moments. The descriptions of their interactions are so vivid that it feels like you're right there with them.
One plot idea could be that the amnesia heroine starts to remember bits and pieces of her past as she spends time with Toma. Their relationship could be a mix of confusion and growing affection. For example, she might remember a special place they used to go to, and as they revisit it, their bond deepens.
One common theme is the process of the reader character helping Shin regain his memories. It often involves a lot of emotional moments as they slowly piece together his past.