二十一夜蔷薇之双生花篇 (Associated Names)

Two years ago, Tang Guo formed an agreement with a spirit summoner to serve her own ends. Tang Shuang, her non-biological younger sister, was used to exchange identities with the spirit summoner, resulting in Tang Shuang developing a terminal illness. Two years later, in order to redeem her past wrongdoings and save Tang Shuang’s life,…