by Hideaki Sena
From the publisher:
When Dr. Nagashima loses his wife in a mysterious car crash, he is overwhelmed with grief but also an eerie sense of purpose; he becomes obsessed wiht reincarnating his dead wife. Her donated kidney is transplanted into a young girl wiht a debilitating disorder, bu the doctor also feels compelled to keep a small sample of her liver in his laboratory. When these cells start mutating rapidly, a consciousness bent on determining its own fate awakens, bent on becoming the new dominant species on earth.