An encounter with a strange medallion leaves 16-year-old Gestalt possessed by the spirit of an ancient Demon King, making him a key player in a war between the Demon King and the Goddess of Life. Unfortunately, the Demon King wants to destroy the world, and the Goddess wants to enslave everyone in it!
With the aid of a talking teddy bear, a grumpy demon dog, and a unicorn princess who wants to marry him, Gestalt embarks on a journey to stop the Goddess' sinister plot and find a way to get rid of the Demon King - yet, he must also rely on the dark power of the Demon King in order to stand a chance against the powerful minions of the Goddess.
Can Gestalt resist against the corrupting temptations of the Demon King and save the world, rather than destroy it? Is it even possible for a mere human to stand up against the power of a goddess?