Given this, it seems like you might be referring to a specific OVA (Original Video Animation) episode or a special titled something like "Himawari Wa Yoru Ni Saku" which could translate to something related to a sunflower blooming at night, and there's a mention of exclusivity to "yoru" which could imply a nighttime setting or theme.
The title metaphor plays on the concept of a “sunflower” (himawari) blooming at night—something unnatural, hinting at forbidden or surreal relationships. The plot involves Takumi attempting to break their curse through ritualistic sexual acts, which is standard for the genre. The OVA focuses heavily on erotic scenes interwoven with a dark, gothic atmosphere.
"No," Hana said. "It’s echoing ."
The mention of exclusivity to "yoru" (night) underscores the OVA's focus on nighttime as not just a setting but perhaps a metaphor for the unconventional. In a world where much of life's action happens under the sun, focusing on night shifts the perspective to those who operate outside the norm, highlighting their stories, struggles, and triumphs.
The story follows , a young man who works at a local Sunflower Shop. The narrative focuses on his complex and often illicit relationships with the women in his life, particularly his stepmother and sister. The OVA adaptation condenses the visual novel's branching paths into a linear, adult-oriented drama characterized by themes of family secrets, obsession, and forbidden romance. Production Details Original Source: Visual Novel by Tiranimis. Format: Two-episode OVA series.