The +Anima are beings who possess animal-like powers. In this alternate universe, they walk among us--shunned by society--as they search for others who have similar traits. Cooro is a crow-like boy who is on a quest to find other +Anima. When he meets Husky, a disrespectful boy with a past shrouded in mystery, he finds a kindred spirit who also possesses animal-like powers. Together, they try to gain acceptance in a world cruel to anyone or anything...

This is the final volume! Cooro and the others discover the 1st Yellow Valley Race, a race exclusively for +Anima. Cooro and Senri decide to enter, and while waiting for the race to start, they run into Lyra, a girl that Cooro knew when he was younger. But when Cooro knew her, she wasn't a +Anima...How can she be one now, and is that the only secret she holds?