As the protagonist of a Mary Sue novel, Ning Yao wakes up every day on an eight-thousand-meter-long bed, with hair that changes color based on his mood and tears that turn into gemstones. Ning Yao lives happily until one day, the system suddenly appears and informs him that he is actually a spoiled antagonist cannon fodder in a tragic protagonist-leveling novel. They are now correcting the world's error by sending him back to the tragic story. In this tragic story, the protagonist Yu Li endures immense suffering and torment from childhood, becoming cold-hearted, ruthless, and sinister, ultimately rising as the top figure and destroying the world. When Ning Yao is abruptly thrown into this world, he finds the protagonist standing right in front of him, with the latter’s mountain-splitting, sea-parting divine sword mere inches away from slitting his throat! Terrified into tears, dazzling and precious gemstones roll all over the ground. The protagonist falls silent for a moment, withdraws his sword, and lifts Ning Yao by the collar, coldly stating, "From now on, you must cry half a chest of gemstones every day, or I’ll kill you." #Just wondering, what does it feel like to be the mobile treasury of a world-destroying demon king?# #The sorrow of being a tool# * At first, Ning Yao cries while pouting with reddened eyes, whimpering, "It hurts." Yu Li doesn’t even glance at him, pressing the sword against his neck. Later— When mere sand irritates his eyes, someone pulls him into an embrace, shielding him from the wind and dust. "Don’t cry," Yu Li’s tone is icy, yet his hold is gentle. "It’s like you’re trying to take my life." * In his past life, Yu Li walked a path of darkness, a feared demon to all. Reborn, nothing seemed different—the world was nothing more than a stage for his vengeance. Until he met Ning Yao. His brutality, indifference, and everything that could inspire dread—all of it receded in this person’s presence, transforming into a shield to ensure Ning Yao shed no more tears. His sun, who illuminated and warmed him, became someone he wished to pull down, to tuck into his arms, monopolizing every ray of light. Until the sun was thoroughly steeped in his essence, inside and out.