I have an Apocalypse City - Chapter 489 - : Upgrading

16 years old-- most boys would be falling in love, as their hormones all rise to unprecedented levels. Most boys at Riley's age would have dreams; dreams that will slowly grow into passion. Riley, however, at age 16... killed the world's number 1 superhero.

As a man who had lived for 20 something years and had always considered himself as a straight man, he woke up one day and found himself possessed by a stupid and cute system. Moreover, it was a gong-shou cultivating system?! Let’s see how a shou with raised hackles evolves into a (pseudo)queen shou, incidentally with a story of a hidden loyal dog gong.

- Description from Novelupdates

In a world where reality shifts with every roll of the dice, a man daily partakes in an extraordinary game with the gods, his actions dictated by his decisions and the face of the dice. He takes great joy in this game until the tables turn, and he himself becomes a piece on the game board. Now, the dice are in his hands, and it’s his turn to shape his own destiny. It’s time for the Snowman to play his part.

“Your fate has been decided. You knew this when you made that decision years ago. The only way out for your family is for your son to marry the Daughter of Destiny. Only her fate is strong enough to save your lineage,” the priest said.“Then we must find this Daughter of Destiny,” the king declared.After committing many evil deeds, a dying king tries to save his family from the wrath of heaven.He had defied heaven once, and he was confident he could do it again. Anastasia, the unflavoured daughter of Duke Thompson, becomes the prey whose good fortune will be used to save the royal family.Would he succeed?? Find out!!