Another world has merged with our own. Elves, beastfolk, and demons now inhabit our world. Kousuke has decided to search for a bride when he meets with Chlorolud, a demon girl who tells him that he's special. He has the power to become the new demon king! With the magic powers bestowed to him he sets out to seduce the girls of the other world. Create tentacles, turn your body into a slime, summon insects that are an extension of yourself, become the demon king and use all your powers to give the heroines the ultimate pleasure. Or keep your humanity and enjoy the sweet and beautiful bodies of girls from another world.