Filled with rage against spirits known as tsukumogami, Kunato Hyoma is sent to live with Nagatsuki Botan to help him see a different side. Though both are part of a clan that return the spirits back to their world with divine powers, their experiences with the otherworldly vessels are vastly different. Kunato, robbed of a loved one, and Nagatsuki, saved by them. Can she get through to him?

The anime centers around Kurumi Azuchimomoyama, a normal 14-year-old girl who attends Egaogaoka Middle School. One day, an angel named "Devilun" that looks like a Tasmanian devil appears before her, and grants her the power to be the beautiful magical girl dinosaur angel warrior "Prima Angel," and tells her to fight the evil "Darkness Whales" organization. She proceeds to indiscriminately take out Darkness Whales members with weapons that stink of blood. The protagonists are three boy classmates of Kurumi who watch the entire thing while not really doing anything.