Due to their parents' remarriage, two brothers and a young woman became a new family. Though raised as step-siblings—she as the elder brother's stepsister, and as the younger brother's stepmother—their relationships begin to shift into something new as they reach middle age. The day finally arrives when long-suppressed feelings are confessed to their respective step-siblings. As forbidden desires awaken between these step-siblings who have long viewed each other as potential partners, a taboo romance unfolds. Which brother will ultimately fulfill his longing—the elder or the younger? This story explores the complex entanglement of familial bonds and illicit love.