Nobuko Izumi (いずみしんいち) was originally just an ordinary high school boy, but a sudden change completely changed his life - his right hand was invaded by a mysterious alien parasite.This self-conscious parasite calls itself "right (ミギー)".Unlike other parasites, right does not completely control the host, but instead establishes a strange and subtle symbiotic relationship with Nobuko. At first, the relationship between the two was full of resistance and temptation.Nobuko loses control of her right hand and is forced to get involved in a world full of unknowns and dangers; while the right gradually shows another side that transcends cold rationality in adapting to human emotions and thinking.The relationship between them, which is both dependent and alert, slowly heats up through the tests of life and death, and eventually develops into an indescribable but profound and moving bond. However, right is not the only parasite on Earth.As more and more parasites begin to kill humans, fear and hatred spread rapidly, and humans launch a hunt for parasites.In this conflict about survival and understanding, fear and trust, Nobuko and Yu were forced to stand at the center of the storm.They are both aliens and bridges; both enemies and companions. This is not only a story about fighting and escape, but also an understanding and warmth about human nature, coexistence and the quietly budding of the soul.