When Su Ran was squatting at the entrance of an old alley to feed the cat, he was stunned by the "World Stability Maintenance System" that suddenly came into his mind - the next second he was thrown into a world on the verge of collapse, and the task was to clear the male protagonist Lin Yuan's full blackening value. As a "narcissus" who holds grudges and defends shortcomings, Su Ran originally just wanted to make a quick decision: get rid of the troublesome male protagonist, and go home to pet the cat immediately after receiving the reward. But reality gave him a hard blow. The gangster's tricks were a hundred times more coquettish than he imagined: one second he was holding a knife on his neck with red eyes, and the next second he was squatting at the door with hot milk in his hands and acting like a loyal dog; one minute he was saying that he was going to destroy the world, and the next minute passers-by were clenching his sleeves in aggrievedness because he praised him. "Every day I feel that the protagonist is even less formal," Su Ran complained to the system. Turning around, she saw Lin Yuan instantly restrained his demonic nature and behaved like a well-behaved large cat. From the initial "just a mission" to the later subconscious protection of his shortcomings, from disdain for being "clingy" to taking the initiative to cover him when he was drunk late at night, Su Ran repeatedly jumped between "can't stand it" and "seems okay". Until a certain crisis, Lin Yuan was seriously injured while protecting him. When the blackening value was cleared, only his figure was reflected in the eyes, and Su Ran cursed in hindsight: "Damn, it smells so good." The sweet and salty clingy male protagonist × the hard-mouthed and soft-hearted Shirakiri Kuro Shou, a two-way struggle that started with the mission and ended with sincerity began.