Genius Grandson of the Loan Shark King

Kim Mu-hyuk, the Grandson of the Loan Shark King Cheon Tae-san, whom even the wealthy elites of South Korea bowed to, strives to be recognized as a member of the Cheon Family. Despite his efforts, Mu-Hyuk is betrayed and killed by his uncles in a vicious struggle over his grandfather's inheritance. However, instead of dying, he wakes up in the 1990's, with a second chance to rewrite his fate. Determined to prevent the death of his grandmother, who raised him, and reclaim the legacy of the Cheon family, Mu-hyuk sets out to preserve his severed friendships and take brutal revenge on his uncles and anyone else who stands in his way. Though once a troublemaker, Mu-hyuk quickly rises to the top both academically and socially, earning his grandfather's trust. As he solidifies his place in the family, Mu-hyuk begins manipulating the underworld, gaining control over criminal organizations and influential figures in politics and business. Gradually, he paves his path to fulfill his ambitions and exact his revenge, one step at a time.

(Source: Naver, translated)