Seven Days of Echoes, the Butterfly of Memory

A phenomenon in which fragments of a person's memories from the seven days before their death “implant” themselves in someone else's dreams is known as a “memory echo.” The male lead receives a “memory echo extractor” from a stranger and is forced to become the recipient of the dead's memories. Then he discovers that the memory fragments of his late girlfriend's death point to one thing: the fact that he is still alive.