Set at the beginning of the 21st century with the population decimated by bioterrorism. Now there are two types of humans. One is the Nokusu that was caused by a virus but survived, so it carries a requirement. Most are young, healthy and highly intelligent, but they are highly sensitive to ultraviolet rays and are active mainly at night. The other group are the Kyurio. They survived without ever having the virus. The Nokusu discriminates against the Kyurio. Tetsuhiko Okudera (Ryunosuke Kamiki) is a Kyurio. He was born in a poor town. He is not happy with being a Kyurio and he wishes he could be a Nokusu. Yui Ikuta (Mugi Kadowaki) is Tetsuhiko's childhood friend. He tries to revive the poor village.