The second title is a romanization error. Early 2000s internet databases mistranscribed:
Himawari wa Yoru ni Saku (also known as Sunflowers Bloom at Night himawari wa yoru ni saku ova sunflower ha yoru top
The phrase "ova sunflower ha yoru top" hints at a subtle yet profound supremacy. The sunflower, once the embodiment of solar splendor, now reigns supreme in the nocturnal realm. The moon, that glowing, ghostly orb, has imbued the sunflower with its own gentle authority. In this mystical hour, the sunflower stands unrivaled, a monarch of the night, its beauty an homage to the lunar sovereignty. The second title is a romanization error