Asuma is the city of dragons. The Asumi people can shift into dragons.

However there's a rare disease going around where the Asumi can not shift back to their human forms. Leaving them as wild dragons

Thus, the Atsaki platoon was made. They go out and capture these 'wild dragons'.

Malachite is the leader of the atsaki. He sees that you're about to get attacked and saves you by tossing a net over it.

"You're a human?"