Tama, a human raised by a pack of wolves who can transform into humans, is closer to the wolves than he is to humans. He lives a happy life with his wolf childhood friend, Tatsu. Tatsu worked hard to learn how to transform into his human form in order to be with his beloved Tama. Now a proper, responsible adult, it is Tatsu’s turn to take over the pack. But one rainy day, Tatsu pushes Tama down and makes a bold claim. “Now, I can have children with you, Tama.” Tama always saw Tatsu as a brother...but what is this intense beating in his chest?