Payback, tome 5

Yu Han, who was expelled from high school and ended up in a major corporation, leads a reckless life, not hesitating to use any means to earn money. However, one day, Yu Han loses his family at the hands of someone who holds a grudge against him. Despite spending each day tirelessly laboring as a form of atonement, an unexpected opportunity reveals the truth about his family's death, leading him to resolve for revenge. And it's through this journey of vengeance that Yu Han encounters a man who offers to "help" him...