My Billionaire Great-Grandfather is 18

80 years ago, a legendary business titan and war hero died shielding his daughter, only to wake up as an 18-year-old humiliated loser. His 80-year-old daughter calls him "Father." An icy CEO kneels before him. A top star throws herself at him. One punch takes down the scumbag. One kick fells the family traitor. Let's watch him reclaim his glory.