One possibility could be that Haku, having finally found a way to the human world, tries to adapt to modern life. He might struggle with things like technology. For example, he could be fascinated by cars but also a bit scared of them at first. He would also have to deal with the different social norms in the human world. Maybe he would make a human friend who helps him understand the world better.
Perhaps Haku arrives in the human world during a festival. He is drawn to the lights and the energy of the people. He starts to interact with the festival -goers, learning about their traditions. But he also attracts the attention of some not - so - nice people who sense that he is different. Haku has to use his magic, which he has to be careful with in the human world, to get away from them and continue his exploration.
In a fanfiction about Haku in the human world, he could be on a quest to find something that was lost in the human world long ago. This could be related to his past in the spirit world. As he searches, he discovers the beauty of human emotions like love and friendship. He might meet an artist who is able to see his true form and decides to paint him, which then becomes a famous piece of art in the story.
In this fanfiction, Haku might be searching for a way to bring some of the beauty of the human world back to the spirit world. He travels across different cities, seeing various forms of art, architecture, and nature. Along the way, he meets a botanist who teaches him about plants. Haku then decides to try and create a garden in the spirit world inspired by what he has seen in the human world. He faces many challenges in transporting the plants and knowledge, but with his determination, he tries his best to make it happen.
Well, in a fanfiction of their marriage, perhaps Chihiro had to overcome many challenges in the human world first. She became a strong and independent woman. Haku, on the other hand, had to prove to the spirits that his love for Chihiro was true. After a series of events, like Chihiro helping the spirits again and Haku showing his loyalty, they got married. Their wedding was a grand affair with both human and spirit guests, symbolizing the harmony between the two worlds.
One possible plot could be that Haku and Chihiro meet again in the spirit world years after Chihiro's first visit. As they reunite, they start to explore their feelings for each other more deeply. They go on adventures together, facing new spirits and challenges, and their relationship gradually blossoms into a romantic one filled with tender moments and mutual understanding.
It could add a romantic element that changes the dynamic between the characters. Instead of just being friends or allies, it makes their relationship more complex. This could influence how they interact with other spirits in the story. For example, some spirits might be more accepting while others could be jealous or against it.
A fanfic could focus on a journey that Haku and Chihiro take together within the spirit world that they didn't get to do in the movie. They could face new challenges and in the process, their relationship deepens as they rely on each other for support.
Well, it could be about Chihiro returning to the spirit world years later. Maybe she has to save it again from a new threat that the spirits can't handle on their own.
One idea could be a story about Haku and Chihiro reuniting in the spirit world years later. Chihiro has grown up but still remembers Haku vividly. Another could be a fanfiction where they go on an adventure together outside of the bathhouse to explore other parts of the spirit realm that were previously unknown to them.
One great fanfic could be 'Chihiro and Haku's New Adventure'. It might explore their relationship further after the events of the movie, like them exploring new parts of the spirit world together.
One possible plot could be that the kiss is a moment of realization for both Chihiro and Haku. It might be a way for them to break a spell that has been holding Haku in some sort of limbo. After the kiss, Haku could start to remember more of his true self and his past, which could lead to him being able to finally leave the spirit world and find peace. And for Chihiro, it could be a sign of her growing up and understanding her feelings in this strange world she has found herself in.
One plot idea could be that the OC is a spirit from a different part of the spirit world who comes to Yubaba's bathhouse. Haku is immediately intrigued by this new spirit and they start to form a bond as they both deal with the chaos in the bathhouse. Another idea is that the OC has a special power that can help Haku break free from Yubaba's control, leading to a journey of self - discovery for both of them.