As he balances schoolwork, motorcycle repairs, and demon slaying - a common family practice - Japanese teen, Yuuri Mito, seems like any other average adolescent. A walk in the woods changes everything when he comes across an ancient artifact and is warned by a mysterious goddess not to touch it. Despite his attempts to resist, the seal is broken, freeing dangerous beings known as tayuti. Amidst the chaos, a breathtaking goddess takes an interest in Yuuri and proposes marriage, but he finds himself embroiled in a conflict among the tayuti. Though his body may weaken, his spirit remains unyielding.