Cyparissus

Cyparissus is a story from Greek mythology about a boy who had a close relationship with a deer. One day, the boy accidentally killed the deer, and he was so sad that he asked the gods to let him mourn forever. The gods granted his wish and turned him into a cypress tree. In the story, the cypress tree is a symbol of mourning and sadness.

So basically, the cyparissus story is about a boy who loved a deer so much, but unfortunately, he accidentally killed it. He was so sad that he wanted to mourn forever, and the gods turned him into a tree as a symbol of his everlasting sadness.