Eyes of Claim, ABO Desire

It was 3 a.m. on a Sunday. There was no rain, no thunder, no strong wind, nor storm. He had been lying comfortably on his bed, reading a novel with the illogical concept of ABO titled Hidden Desire. It told the story of an Omega named Gao Tu who hid his classification for various reasons. With all his charms, he somehow managed to make two powerful men fall in love with him: an Alpha named Shen Wenlang and an Enigma named Hua Yong.

Now he had fallen into the world of that novel and become a fifteen years old Sheng Shaoyou, a character not particularly significant to the plot. In the novel, Sheng Shaoyou was described as arrogant and reckless yet soft-hearted. In truth, Sheng Shaoyou's background was never fully explained. It was only known that he had many illegitimate siblings who wanted to replace him as the Sheng family heir, and that he was quite the playboy.

Now that he was Sheng Shaoyou, he found out that the word 'many' truly did justice to the real number of illegitimate siblings. Because what do you mean there were seventeen other children besides Sheng Shaoyou?! And almost all of them had tried to harm him one way or another?! The original Sheng Shaoyou must have been a total badass to still be standing proud after all that.

Well, he was never a good person to begin with. It was only a matter of time before that number decreased. It would have to start from the root, though. And if the President of ShengFang Biology suddenly experienced declining health... well, one could only call it fate.

But for now, Shaoyou needed to get to know all of his siblings. Otherwise, how would he decide which ones deserved to stay in the Sheng family?

Huh? Wait... why is this Omega acted very friendly with him? And this Alpha, why is he suddenly everywhere? A-and this Enigma, why is there traces of his pheromones in every place?

[Reader-insert! Sheng Shaoyou / Sheng Shaoyou-centric! Also warning, there's many OC for the plot]