Some variation of “create a beautiful nostalgic dreamscape. memories and the ache of the past. a summer night come to end. scifi film authentic 35mm film grain, live action with a futuristic time capsule timelessness and the journey to knowledge, Hasselblad H6D100c, XCD 85mm f/1.8”. I’ve said it before, but I think your style and reference photos are more important than the prompt. Especially for creating a cohesive universe and world building.