A lonely middle-aged man is summoned to the Magic Kingdom of Perahiem by Princess Iris, who seeks to learn the art of sexual pleasure to save her world from extinction. After discovering that the kingdom's inhabitants are devoid of sexual knowledge, the man uses his "unlimited desire" to please the princess. When the Queen intervenes, he cleverly disguises their carnal activities as advanced "negotiation techniques" from his own world, piquing the Queen's curiosity.
To prepare for the arrival of the Legendary Demon Lord and prevent a global catastrophe, the protagonist convinces the prideful Queen to join Princess Iris in joint sexual training. Despite her initial resistance, the Queen eventually surrenders to the pleasure, leading to an intimate bonding experience between mother and daughter as they commit themselves to the protagonist's rigorous guidance.