Does this zombie anime sound original?

50 years ago there was a viral outbreak during an experimental project. A virus consumed the bio-engineered beings known as leeches. This leeches went through a mutation which turned them into blood-sucking creatures that devoured the heart/soul of human. They harvested in human heart and once they took control they went through another mutation and became "raptors". Beings that consumed human organs. The viral was also exposed on human beings and turned them into "velocions". Though they didn't craved human blood they beings were nevertheless dangerous. Drico, a young "velecion" goes on a mission to track down a powerful velocion that consumed his half-sister suki.... How does this sound so far? good bad? why or why not?