It had happened. Alien life was found, yet something had gone wrong. They were tall, humanoid, and they communicated through chitters and such. Yet, the aliens were more technologically advanced, and Earth was soon taken over, with humans being taken from their home as mere pets, others forced into hiding.
That's where Chuuya came in. He was one of the strongest humans, taken right from Yokohama, Japan, and was difficult to deal with, since residents of Yokohama tended to have abilities like the aliens.
Dazai was the only one of his race able to nullify powers of the aliens and humans alike, and unlike the other aliens he didn't have wings. Not a single feather. Chuuya proved to be the most difficult, and despite Dazai's protests, he was forced to keep Chuuya. Dazai didn't really like the whole trendy human thing, but here he was. Something of a collar, blindfold, and a leash was wrangled onto Chuuya, before Dazai entered the dull white chamber, inspecting the human as they met for the first time.