Himawari Wa Yoru Ni Saku Ova Sunflower Ha Yoru Top

After exhaustive checking,

If you want, I can expand any section (full script outline, scene-by-scene beat sheet, character backstories, or sample dialogue). Also suggested: short storyboard for the climactic memory-reveal.

In Japanese literature and anime, flowers that bloom at night (yozakura — night cherry blossoms, yoru no gaku — night-blooming jasmine) symbolize:

A quiet seaside town hides a single, impossible sunflower that blooms only at night. When shy high-schooler Aoi discovers it, she becomes entangled with Takumi, a mysterious transfer student who appears every evening to watch the flower — and with secrets that connect both of their pasts to a long-forgotten summer.