After Faking My Death and Starting Over, Everyone Thinks I'm a Little Kid

[Daily updates after going VIP. Taking breaks when needed. The love interest is the Lord God.] When a person is about to die, their words are kind. Before dying, the villain said to the righteous-looking protagonist, "I forgot to mention, I'm nineteen this year." They had gone from close friends to betraying one another, entangled for ten years. The middle-aged protagonist didn't believe him. Even on the verge of death, he couldn't stop running his mouth. "Why not say you're eighteen?" The villain smiled and closed his eyes, leaving him with one last remark: teeth don't lie. An autopsy was performed, and the carbon-14 isotope content in the tooth enamel was analyzed. The margin of error was within 1.6 years. The protagonist received the results. They said: estimated age, 18-20. He was stunned. The young man who had shared a bed with him ten years ago had been only nine at the time? The villain was dead, and the protagonist inexplicably lost his will to fight. Thinking back over all the years they had spent getting along, falling out, and becoming enemies, his face burned as he stared in a daze. Who could have imagined that he had been squabbling and fighting over things with someone who was practically a "little kid"? · Dong Ji crouched by the roadside and asked in a childish voice, "System Uncle, why is my body so big and tall?" The System had accidentally drawn the Host's childhood soul, then committed a terrible blunder by forcing the child to grow into a nineteen-year-old adult overnight. It trembled: ... It nervously suggested, "Dongdong, how about we read the lines just like the storybook says in a little while?" "I'll buy you a piece of candy for every line you get right." Dong Ji had only ever seen candy on TV. His eyes lit up, he swallowed, and he happily agreed. For the next ten years, Dong Ji followed the script the System gave him, completing the villain's storyline step by step. Before retiring in triumph, he looked at his first mission target, overcome with emotion, and couldn't help revealing his biggest secret. The System tried to stop him, but Dong Ji simply said, "You used child labor back then, and I didn't report you to the Lord God." The System fell silent. Dong Ji returned to the Lord God's domain and lamented, "I didn't get to fall in love in that world." His handsome, youthful face, with a soul just over nineteen and skin soft enough to pinch, brimmed with longing. "Uncle System, can I have a romance in the next world?" Instead of a "romance world," Dong Ji got a reboot of the first world. He crouched in confusion on the street, frantically poking at the System. The System was dead. All he heard was the protagonist nearby, looking deeply conflicted yet relieved, calling out to him: "Dong Ji." The protagonist took Dong Ji by the hand. "Do you want some candy?" Dong Ji: ? Later, he heard the protagonist mumble, thinking he hadn't been noticed, "Should I have him call me big brother or uncle?" Looking at Dong Ji, the protagonist abruptly made up his mind. "How about I adopt you, and you call me Dad?" Dong Ji: ??? = Dong Ji's Diary 1: Everyone thinks I'm a nine-year-old child. I keep trying to explain that I'm already nineteen. Nobody believes me. Wah. Diary 2: I want to fall in love, I want to fall in love. I'm nineteen! Why can't I fall in love? (The protagonist uncle walks by, crosses out "nineteen," and adds: Dongdong, you're only nine this year. No dating!) = Personal setting: A nineteen-year-old adult body, an unscientific product of the System forcing a child to grow overnight. He looks entirely like a young man, and only an examination of his teeth and bones can reveal the truth. Everyone is guilt-ridden and full of regret. After the world is rebooted, they try to make amends in this story about raising a child. Content warnings: The official couple appears midway through the story, and the pairing is set. The main focus is on "everyone raising the child." An angsty, bittersweet tone. [Premise screenshotted on 2023.9.4] Theme: Ban child labor and protect the physical and mental well-being of minors