The Dragon Escapes from Prison — Episode 4

Protagonist takes the fall for girlfriend, sent to prison, unaware his girlfriend and wealthy heir killed his older brother. Girlfriend betrays him for the heir. In prison, he inherits a secretive, powerful organization of businessmen, aristocrats, and mafia bosses, becoming leader. Upon release, finds father died of grief; mother, sister, sister-in-law face harassment. At funeral, heir causes trouble; protagonist defends family and revives father using inherited power. At heir's family celebration, he storms in with brother's coffin, defeats experts, avenges death. Faces further threats from criminal extortion groups and workplace bullying, ultimately gaining family respect and fully commanding the organization.