1. Male protagonist: Lin Chen
Previous life: Born into an ordinary family, he was timid and softhearted, loyal and devoted, but was taken advantage of. His sworn brother, Zhang Hao, schemed against him, stole his startup project, and drained all his savings. His girlfriend, Su Wan, betrayed him and cruelly trampled on him after climbing into the bed of a rich heir. His biased parents endlessly bled him dry to support his gambling-addicted, lazy younger brother. In the end, buried in debt, he was set up by his enemies and killed in the street. As he died, he saw the ugly truth about everyone and left this world consumed by hatred.
After being reborn: He returns to the start of his junior year, binds himself to an Overpowered System, and undergoes a complete transformation. Calm, calculating, decisive, and quick to repay every slight, he devotes himself to revenge and protecting his family. He knows the difference between good and evil, and is kind only to those who sincerely treat him well. Relying on the System and his memories of his previous life, he climbs to the top of the business world and becomes a top tycoon in the city.
It's pretty good. The chapters are clear and it's just fun.