Study Monster Cultivation System - Chapter 372 - 371 people at Ji University are all queuing up for one person’s foreign exchange.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Renji was nothing special. No wealth, no fame, no grand ambitions—just a 23-year-old gamer wasting his days in a cluttered apartment, escaping reality through the immersive world of Eternal Realms. In the game, he was powerful, respected, a leader—the elven king, commanding armies and shaping the fate of kingdoms. But outside the screen, he was just another nobody.That all changed the moment his world shattered.What started as a routine gaming session took a terrifying turn when his screen flickered, reality twisted, and an unnatural force yanked him from his chair. When he opened his eyes, he wasn’t in his apartment anymore. He was in a world of towering forests and ancient magic. He was wearing regal robes, a golden crown resting atop his head. And before him stood four elven women, their expressions filled with reverence and concern.They called him King.Memories not his own flooded his mind—battles, alliances, the weight of a kingdom’s future resting on his shoulders. It wasn’t just a game anymore. This was real. And the fate of the elven race now depended on him.But Renji wasn’t a hero. He wasn’t a warrior. He was just a gamer who had no idea how to rule a kingdom, let alone survive in a world teetering on the brink of war.But Just as he was pondering on it a mechanical voice sounded in his mind.

Frank, a mercenary known for his cold ruthlessness, decides it’s time to leave the bloody world of the underworld behind. But the underworld has no plans of letting him go. Relentless enemies from his violent past keep hunting him, and eventually, they succeed—Frank is killed.But fate has other plans. Instead of staying dead, he is mysteriously reincarnated into the body of a cop in a world filled with crime, corruption, and dark secrets. With the help of a strange, all-knowing system, Frank is given the chance to live again—this time, to prevent crime before it happens.

Ye Chen transmigrated to a parallel world. In this world, everyone who was 18 and above would enter a chat group named Monster Chat. From there, they would summon their pets.Each person only had 10 chances of summoning pets and one chance to form a bond with a pet. Right at this moment, a voice rang in Ye Chen’s head:[Ding! Successfully activated the Unlimited Summoning System.][Congratulations for summoning pet: Dark Princess (level 8)][Congratulations for summoning pet: Alchemist (level 7)][Congratulations for summoning pet: Female Asura (level 7)][Congratulations for summoning pet: Goddess (level 9)][Congratulations for summoning pet: Demon Fox (level 10)][Congratulations for summoning pet: Nyuwa (level 10)]……This was an era where humans, monsters and pets coexisted. This was also Ye Chen’s era.