It’s Hard Being a Villain’s Dad

There's a novel where the protagonist gong is a high-status alpha who embodies every noble and upright quality, while the protagonist shou is an omega who was lost for over a decade before being found. Despite enduring all kinds of hardships, he remains kindhearted. They fall in love at first sight at a banquet, and then go through the whole package: engagement, marriage, and a child. But there's also a cannon-fodder omega in their story. He's the protagonist shou's cousin and the least favored member of his family. When the protagonist shou went missing, he was slated to marry the protagonist gong. Now that the protagonist shou is back, he can only watch as the two leads get engaged, marry, and have a child, before turning evil. The cannon-fodder shou is cruel, wicked, and thoroughly vile. He nearly gets the protagonist shou killed several times, and naturally meets a tragic end... Unfortunately, Cheng Shulan transmigrated into the body of that cannon-fodder shou's alpha father. He opened his eyes to find himself weakly lying in a dilapidated house, with a sobbing child kneeling nearby. The child's cheeks were flushed red, his face covered in tears and snot. He opened his mouth and called, “Dad...” Cheng Shulan was shocked. “What did you just call me?!” “Dad, I'm scared. Waaaah...” “...” Cheng Shulan's vision went black, and he nearly passed out again. * Cheng Shulan was eighteen, with the college entrance exams coming up. He had transmigrated into the body of the original character, who was also eighteen but already a first-year student at the Military Academy in the capital city of the Eryne Kingdom. Eryne Kingdom law stipulated that all alphas and omegas with a mental strength rating of C or above were forbidden from dating freely and had to wait until they turned twenty to be assigned a marriage partner. So an alpha like Cheng Shulan, who had a child aged four or five at just eighteen, had, to put it simply... Broken the law. The good news was... His mental strength was only D-grade. He was a weakling alpha who wouldn't be assigned a marriage partner. The bad news was... He later met the child's omega father. The man's name was Zhu Yu. As the only young master of the Zhu family, the most prominent family in Eryne Kingdom, he was naturally flawless in looks and outstanding in ability. He drew everyone's attention wherever he went. Standing at the center of the stage at school, with every spotlight trained on him, Zhu Yu gazed out at the audience with a cool expression. In a corner seat, Cheng Shulan turned the child's face toward him. The cannon-fodder shou, who was wicked beyond redemption in the original novel, was currently sucking on a lollipop bigger than his own face, gazing at him with dark, round eyes. Cheng Shulan looked at the child, then at Zhu Yu onstage. After a long silence, he asked the person next to him, “Do you know what Zhu Yu's mental strength rating is?” The person beside him answered in surprise, “Zhu Yu is the only A+ omega among all the new students. You didn't know that?” “How old is he?” “Same age as us.” Cheng Shulan: “...” It's over. Zhu Yu broke the law. And now Cheng Shulan was implicated too. * The Zhu family noticed that their young master had been acting strangely lately, keeping busy all day without anyone knowing what he was doing. Then one day, the butler saw Zhu Yu standing by the window with a stack of reports in his hands. He went over to ask what was going on. Zhu Yu turned around and asked, looking confused and dazed, “Do you think it's possible that I have a biological child who's four or five years old?” The butler: “...” The butler broke down on the spot. Young master, what are you talking about?! You just started university! You haven't even gone through the marriage assignment. Where would a child come from?! Notes: 1. The child transmigrated from the original novel, and is also biologically the child of the gong and shou. 2. There are lots of original settings. 3. I'll add more if I think of anything. Theme: Be a good person, not a bad one.