Mistaken Marriage to Demon Lair, I Became the Group Favorite

In her past life, Han Zhixin had her engagement stolen by her sister, Han Zhihua, forcing her to marry the abusive Jiang Wenyao, where she and her sister met a tragic end together. Reborn, Han Zhihua chooses Jiang Wenyao, while Han Zhixin follows the engagement to marry Gu Hanyang. Believing Jiang Wenyao will succeed and the Gu family will collapse, Han Zhihua suffers his abuse repeatedly. Meanwhile, Han Zhixin tirelessly protects Gu Hanyang from his past death curse and saves the Gu family. In the end, Han Zhihua goes mad, commits violence, and dies. Gu Hanyang dreams of their past life, resolves his heart's knot with Han Zhixin, and they live happily ever after.