Are there flowers that kill relationships or relationships that kill flowers?

“400 pétalos” (400 petals) tells the story of René and Sun, two opposites that love each other... Until René gives Sun a magical Marigold. A petal from the magical flower falls every time the couple fights. Amidst such countdown, René’s anxiety grows. He wonders if, when the Marigold runs out of petals, the relationship will meet its end.