After saving another world, I returned to my original body, only to find the empire's 'mad dog,' Lexion, transformed into a tempting pervert, demanding I spank his butt. I was trembling in fear of this man, who looked angry enough to wring my neck at any moment, when a system message, which I thought I'd never see again, suddenly appeared: [System Message] A Destiny Quest has begun. Receive a spank from Destiny (0/100)?! My doubts were short-lived. My body, which had changed due to my soul being swapped, reacted sensitively to Lexion's touch, and Nadia, who had never even held a man's hand, unwillingly found herself spending days where her very bones and flesh burned. A life that felt genuinely M, not just M-like, but truly M. 'I'm an M?!'
King Dark Fleet is bored of ruling the Demon World and so he appoints a successor by the name of Yoshida. The demons are thrown into a rage when they realize that this Yoshida is a human boy. Cute demons begin to enter our world through a magic mirror, bent on killing Yoshida and taking the throne for themselves. Of course, the young boy has no idea of his new kingship and only has his limited magical powers to protect himself and his friend, Ageha.