King - Chapter 4 - 3, Stupidity is the Greatest Sin_1

Haruto Hayase was a normal high school boy in his third year, living a quiet life until his younger sister, Haruka Hayase, joined the same school. Haruka’s beauty and charm made her the center of attention, quickly becoming the school’s prima donna. But when a notorious gang leader set his sights on her, he did everything in his power to protect her—only to fail tragically. Haruka was brutally assaulted and tortured, and Haruto himself suffered an agonizing death. However, in a twist of fate, Haruto is given a second chance, waking up a year before the events that shattered his life. Armed with the mysterious ‘Debauchery System Slave’, he vows to exact revenge on those responsible. This time, he will use his newfound powers of the system and charm to seduce the loved ones of his enemies. From their mothers, sisters, and lovers to their closest friends, Haruto will make them his. His enemies will suffer as he steals what they hold dearest, ensuring their downfall in the most devastating way possible.

The formless ancient world was infested with despicable demons. They hunted and feasted on mankind, keeping the human civilization constantly in a weak and suppressed state.

During the first known year, a magical mountain descended into the world from the realm of the Gods. Carved on this enormous mountain was a message: ‘Heaven Prevails’…

After the Grand Descent, a name that was given to the descending of the mountain, the Three Great Sages made their ways to Mystic Mountain where they learned to harvest what we now call magic, establishing the Mystic Cults and eighty-one sacred shrines to help aid mankind with the cult’s mystic powers against the eternal fight to the death with demons.

- Description from Novelupdates

Luke transmigrates as Abel Bishop into an alternate world vastly different from his own. On the surface, it appears ordinary, but beneath lies a hidden war.A special group of people, known as Occultists, wield supernatural abilities to combat the anomalous entities that threaten humanity's existence.Thrown headfirst into this age-old conflict, Abel has only his strange abilities, his sheer will to survive, and a mysterious coin that always returns no matter how many times he tries to get rid of it...

For Chen Cheng, thirty means interest—the interest rate.From 3,000, to 100,000, to a million, to ten million, and then to over a hundred million...An ever-increasing amount of principal, an endless stream of interest.With money generating money, compounded interest calculations made Chen Cheng exclaim:This money can't be spent! Absolutely can't be spent! For a lifetime, I can't finish spending it!