I'm not entirely sure about the specific 'oro plata mata' story. It could be something specific to a certain region, culture or even a local folktale. Without more context, it's difficult to provide a detailed account.
One horror story is when a florist received an order for a big wedding. They prepared all the beautiful floral arrangements days in advance. But on the wedding day, a huge storm hit. The delivery van got stuck in the flood, and most of the flowers were ruined. The florist had to rush to find any available flowers and redo the arrangements at the last minute.
The origin of the 'oro plata mata' story could be rooted in the history and culture of a specific group. It could have been passed down orally for generations, with the elements of gold ('oro'), silver ('plata') and death ('mata') having significance within that cultural context. Maybe it was a cautionary tale told to warn against the perils of excessive greed for precious metals. But without more research, it's hard to be certain.
I'm not sure exactly who the main characters are in this light novel. But surely the florist themselves is a main character. There might be a mentor figure who taught the florist their skills or a rival florist who challenges them. There could also be some regular customers who play important roles in the story, like a young girl who comes to the shop every week and has a special bond with the florist.
Late deliveries are quite common. Maybe due to traffic, vehicle problems or unexpected events. Another is customers being difficult, like changing orders at the last minute or not being satisfied no matter what. Also, issues with flower quality like getting a batch of flowers that are already half - dead on arrival can be a horror for florists.
Well, there's the story of a florist who had a cat that loved to sleep among the flower arrangements. One day, a customer came in and didn't notice the cat at first. When they did, they were so surprised and delighted. It became a regular thing for customers to come in just to see the cat.
Once, a florist got an order for a huge bouquet for a wedding. But the florist's dog accidentally knocked over half of the arranged flowers right before delivery. In a rush, the florist rearranged it in a new, unique style. When the bride saw it, she loved it even more than the original design because it looked so different and artsy.
Well, it could be that in the manhwa, Wendy the Florist has a reputation for being unreliable or untrustworthy. Maybe there have been instances of wrong orders or poor customer treatment. Or it might just be that the place has a creepy or unwelcoming atmosphere.