Shin Ringetsu(2008)

Shin Ringetsu is a supernatural drama series centered on an ancient curse binding two families across generations. Centuries ago, a vengeful spirit condemned the Rindo Clan to bear no male heirs, forcing them to seek bloodline unions with the spiritually gifted Higetsu family every three generations to break the spell. The Higetsu have served as devoted retainers ever since, bound by duty and tradition. When Naoto, the current Rindo heir, loses his fiancée Suzune in a tragic accident, he faces pressure to find a replacement bride—one capable of producing an heir and fulfilling the dark pact that has defined both families for centuries. The series explores themes of fate, obligation, and the personal cost of ancient curses.