Renketsu Houshiki

When tragedy strikes, Keisuke's world is turned upside down. His father receives a devastating cancer diagnosis, forcing the family to confront their deepest fears. Amidst this turmoil, Keisuke decides to uphold his family's heritage by taking over the liquor business and marrying the daughter of an old friend. But one obstacle stands in his path: his sister Misaki. Already bound by more than just blood, these siblings find themselves entwined in a scandalous web of passion and desire as they defy societal norms. With their hearts, minds, and bodies consumed by an intense affair on the eve of Keisuke's fiancée’s family meeting, Misaki unveils her true feelings for her brother. As they surrender to the irresistible power of their shared carnal connection, the boundaries between sibling love and forbidden romance begin to blur.