There are those among humans who are different than the rest. Those called +Anima are granted the ability to transform into the animal bestowed upon them. They are notable for a black birthmark in the shape of their animal. Some are born with the ability, others are diagnosed with it in painful situations. They are rejected in society and many struggle to find their place in the world.
The two countries, Asteria and Sailand, have begun arguing over the fate of +Anima. Asteria believes that they are valuable instruments in war whereas Sailand believes they are meant to be slaves for the community. Will the +Anima find their place in the world as equals, or are they doomed to forever be looked down upon?