The future is here and a new species lives among people: humanoids. Similar to man, these robotic beings are highly sentient and suffer from unique ailments. Thankfully, Dr. Hikaru Sudou can help. He vows to treat the humanoids even by illegal means, causing him to lead a double life. But when strange diseases emerge as a result of this coexistence, ethical lines become blurred. (Source: Crunchyroll, edited)