Sisters in Forbidden Love: I Had No Choice but to Marry Her

Qin Yufan, an accountant in the finance office of a certain organization in City A, was preparing for her wedding to Chen Yongfu, her fiance who was planning to marry into the Qin family. But one day, Chen Yongfu got drunk by chance and ended up sleeping with Qin Yunan, Qin Yufan's younger sister, who had come to take her place in welcoming him to the Qin family. Qin Yunan became pregnant as a result. To protect her younger sister's reputation, Qin Yufan resolutely gave her fiance up to her. Later, because their relationship was unhappy, Qin Yunan took the husband who had never really been hers and returned him to her older sister.