Blue Singing(1980)

Blue Singing is a Japanese drama series that weaves romance with corporate intrigue. When siblings Tetsuo and Hanako rescue Megumi Kuroki and Kiyotaka Sawada from bikers, they're invited to the Sawada home—only to discover the family's patriarch once destroyed Tetsuo's father's career. As Hanako falls for Kiyotaka, tensions mount over an arranged marriage and old family wounds. The situation darkens when Kiyotaka's father meets with Tetsuo's mother to apologize, and both vanish without trace. A burned body surfaces, but Tetsuo's mother remains missing. The siblings must uncover the truth behind the disappearance, with clues pointing toward their aunt Sumire and secrets that could reshape everything they thought they knew about their families.