Friendship might also be a theme. Maybe Laura has a secret friendship that she's been hiding, and the story could revolve around the reasons for that secrecy, how it affects her, and how she manages it within her other relationships.
Another theme could be mystery. Given that it's a 'secret' story, there's likely an element of the unknown. It could involve Laura trying to solve a mystery, like a missing object or a strange event that happened in her town.
Survival could be a theme as well. If the story is set in a difficult environment, like a post - apocalyptic world or a harsh wilderness, Laura might have to fight for her survival. This could involve finding food, shelter, and protecting herself from danger. Or it could be a story about family, with Laura having to deal with family issues, like conflicts between family members or trying to keep her family together in tough times.
One possible theme could be hope. If Laura is in a tough situation and the star represents something to look forward to or a guiding light, hope would be a theme.
One possible theme could be mystery, since it's called a 'secret' story. Another could be self - discovery if Vincent is on a journey within the story.
Another element might be a hidden talent. She could be secretly an amazing painter or a talented singer but for some reason has not revealed this side of herself. For example, she might be afraid of the public attention that would come with it or she might be using it as a personal escape from her daily life.
One theme could be change. As the title implies saying goodbye, it suggests a shift from one state to another. Maybe the character has outgrown the relationship with Laura or the situation she represents.
One possible theme could be transformation. Since Laura is saying 'so long' to normal, she is likely undergoing some sort of change.
One possible theme could be mystery. Since it's a 'secret story', mystery is likely to be involved. Another theme might be self - discovery. If Jordan is the main character, perhaps through the secret they learn something new about themselves.
One possible theme could be self - discovery. Maybe Christina went through a journey where she learned something new about herself.
One possible theme could be secrecy itself. How keeping secrets can impact a person's life, relationships, and self - identity. Another could be discovery, as in the process of uncovering the secrets in Claudio's story.
One possible theme could be mystery. Since it's a secret story, there's likely an element of the unknown that needs to be unraveled.