For as long as anyone can remember, people have believed that illness brings only suffering. They never imagined that it could also grant humans superpowers. Those who awaken superpowers call themselves “Superill.” He Wuran, an ordinary 16-year-old high school student, accidentally unlocks a second personality, “Shadow,” and gains superpowers, becoming a Superill. But he discovers that the Superill and the world are hiding far too many secrets, and that things aren’t as simple as they seem. Thus begins the story of a “sick boy.”
