After waking up in the luxurious bedroom of Maxwell Garfield, the protagonist quickly realizes he has transmigrated into a magical world where his host body is despised for having zero magic talent. Under the pretense of memory loss, Max adapts to his new environment and forms an intimate connection with his loyal maid Lilly. A passionate kiss triggers the Lust System, a powerful cheat that allows him to gain points through romantic encounters and distribute them directly into his statistics. Seeking to hide his rapid growth, Max secretly upgrades his strength, agility, and mana, successfully awakening a dormant fire element. The ultimate face-slapping moment occurs during a family dinner where his mocking half-siblings, William and Noah, ridicule him as a useless parasite. Max silently raises his hand, manifesting a dense ball of concentrated mana that leaves his brothers speechless and brings his viscount father to tears of joy. To further test his newfound abilities and gain combat experience, Max convinces his cold but caring sister Emily to take him to the dangerous Magical Beasts Forest, where he witnesses real magic in action. However, the expedition reveals that the beast population is growing unnervingly dense, hinting at a massive impending disaster that threatens to consume the entire region. Just as Max returns to the manor to consolidate his power, his sister-in-law Eva, impressed by his sudden rise and seeking a powerful protector, approaches his room with seduction in mind, setting the stage for a dangerous game of forbidden desires and hidden family politics. As Max indulges in these secret encounters to farm massive amounts of lust points, he remains unaware of the dark forces converging on his home town, where the fragile peace is about to shatter under the weight of an unprecedented monster invasion that will force him to choose between hiding his true strength or risking his life to protect those he has come to love, unaware that a deadly shadow is already watching his every move from the dark.

While venturing into the forest with Lilly for practical training, Max is confronted with the horrifying reality of a sudden beast tide. Recognizing the danger of a nearby two-star silver wolf, they make a desperate retreat back to Claymore Town, only to find it transformed into a chaotic bloodbath. The invasion has devastated the town, and a swarm of monsters breaches the Viscount manor, putting Max's stepmothers and sisters-in-law in mortal peril. With the family's knights decimated and the butler George overwhelmed, Max is forced to act. In a desperate bid for survival, he dumps his accumulated ten thousand lust points directly into his mana pool, violently pushing his capacity past the two-star threshold. The sudden influx of power threatens to tear his fragile body apart from the inside, but it grants him the raw destructive force needed to manifest massive, elemental fireballs. Max unleashes a devastating magical barrage, vaporizing a horde of lower-grade monsters and severely wounding the peak two-star silver wolf. Despite his staggering stamina exhaustion and the system's warning of his rapidly corroding vitality, Max pushes himself to the absolute limit, delivering a final explosive blow that pulverizes the beast's skull. He collapses unconscious just as his father arrives to secure the area, having successfully defended his home and saved his family from certain death. This brutal battle forces Max to realize the true stakes of this dangerous world, prompting him to seek a way to form a permanent mana core before his overflowing power destroys his own body. To survive, he must rely on the guidance of his cold stepmother Esther, who agrees to help him navigate the dangerous process of core formation. Yet, even as he succeeds in stabilizing his energy, a mysterious, glowing crimson ring he recently purchased begins to react to his newly formed core, threatening to drag his consciousness into an unknown and highly dangerous dimension.

Upon channeling his newly stabilized mana into the mysterious crimson ring, Max is abruptly teleported to a scorching volcanic cave, finding himself standing on a stone platform surrounded by bubbling magma. He is not alone, as four other powerful mages, including the lazy five-star genius Schwartz Darvis and the cold prodigy Margaret Adler, have also been summoned as potential successors to the Crimson Monarch, an ancient eight-star legend. The trial begins with a test of fire elemental affinity, where Max astounds the ancient spirit of the Monarch by manifesting a red halo that expands to nearly eight meters, surpassing almost all other contenders. This high affinity qualifies him for the second phase, a brutal trial of strength where their mana cores are sealed to a uniform two-star level to ensure a fair competition. Max is sent to a scorched battlefield swarming with tough earth golems, where he must rely purely on his spell control and limited stamina to survive. Despite his lack of formal combat training, Max uses his high intelligence to efficiently cast double fireballs, destroying ninety-four golems before his stamina completely bottoms out, forcing him to escape back to the safety of the altar. Impressed by his unmatched elemental affinity and respectable combat performance, the Crimson Monarch decides to grant his ultimate legacy, the Crimson Dragon Spell, to both Max and Margaret. Max is sent back to his room with the powerful spell imprinted in his mind, but with a strict warning that attempting to use it before reaching the four-star realm will destroy his body. He barely has time to recover before he is confronted by his seductive sister-in-law Eva once again, who seeks to deepen their illicit relationship, while a mysterious white-haired woman arrives at the manor with her eyes set on taking Lilly away to a distant sect, forcing Max to realize that his current strength is still far from enough to protect his loved ones from being torn from his side.

Following the emotional departure of Lilly, who leaves with the mysterious white-haired master to unlock her true ice potential, Max resolves to enter the prestigious Cloud Academy to quickly grow his power. Accompanied by his driver and the newly recruited dual-elemental talent Neer, Max travels to Zexin City to participate in the grand public recruitment tournament. The city is packed with arrogant young masters and representatives from elite magic academies, creating a highly volatile environment where status and strength are constantly challenged. Max easily handles a brief provocation from the arrogant noble Timon, demonstrating his superior physical conditioning and swift reflexes before entering the massive Colosseum. The first phase of the recruitment involves a public testing of elemental affinity and physical output, drawing thousands of spectators and talent scouts. Neer shocks the entire arena by revealing his rare dual-elemental status, prompting a fierce bidding war among the academy envoys who scramble to recruit him. When Max steps up to the testing stone, he decides to show just enough of his power to qualify without exposing the full extent of his system-enhanced attributes, recording an impressive physical output score of ninety-one units as a two-star mage. This solid performance attracts the attention of several prominent envoys, including those from the Cloud Academy and the Royal Academy, who begin to view him as a prime candidate. However, his display also draws the venomous gaze of Dalton, a powerful local young master who views Max as a direct threat to his family's dominance in the city, setting up a dangerous confrontation in the upcoming combat trials where any mistake could lead to a fatal ambush. With the arena matches about to begin and the envoys watching closely, Max must prepare to fight not just for a spot in the academy, but for his very survival against a conspiracy designed to eliminate him before he can ever unleash his true potential.