The Schoolgirl Secret Agent - Chapter 620 - You Guys Are Doomed—You Shouldn’t Think About Leaving

They called him useless. A Class E farmer in a world where strength meant survival.Betrayed by the woman he loved, beaten by a power-hungry King, and left to die like trash, Isaac thought his story had ended.But death was only the beginning.Beneath the earth, sealed for thousands of years, a forgotten being awakens, an ancient force of ruin once feared by angels and demons alike. When Isaac agrees to its desperate offer, he doesn’t just survive… he becomes something else. Stronger. Colder. Hungrier.Now reborn with a forbidden power that rejects magic itself, Isaac walks the line between man and monster. Each time he unleashes the Abyssal Overdrive, his strength grows, but so does the Corruption threatening to devour what’s left of his soul.To protect the innocent, he must become the very thing they fear.To destroy the kings who shattered his life, he must embrace the darkness within.Enemies will fall. Secrets will unravel. And when the kingdom of Carreon learn that Isaac is still alive… it will already be too late.The world shunned him. Now, it will kneel.

Traversing into a Fantasy World, Watson became the youngest son of a run-down baron, ranked eight in the family.

Traveling to a parallel world where demons reawaken, Lin Heng becomes a Daoist and is tangled with the eerie Life-Buying Money.One day, ten years of life are borrowed, and as he faces the brink of extinction, fortunately, the system activates!“Fusion, Five Thunders Righteous Method!”With the Great Divine Techniques of the Celestial Master's Mansion in hand, Lin Heng awaits the eerie entities coming for his life that night.

This book is about Jay (ceo of Mariano Enterprises) and Keifer (ceo of Watson Enterprises) falling in love. Ofc Jayfer is the endgame :)