The Only One I Can't See(1992)

The Only One I Can't See is a Japanese drama series centered on a private lawyer with multiple personalities who pursues the widow of a wealthy conglomerate for her inheritance. When university student Kawashima Megumi is mistaken for her estranged older sister Maiko, she receives a mysterious key to a coin locker containing a diary belonging to their biological father—a powerful zaibatsu leader. Assuming her sister's identity, Megumi infiltrates the widow's circle, uncovering dangerous secrets tied to the family's vast fortune. As she navigates this web of deception, Megumi must confront the lawyer's fractured mind and the truth about her father's past, all while risking exposure. The series blends psychological thriller elements with family drama, exploring themes of identity, greed, and redemption against Japan's corporate underworld.