Hehehe, I recommend you a novel called My Two-Dimensional Goddess Wife. Although the female lead did not become Yin Shi's sister in Yin Hun, this book was related to the manga, and the female lead was also very powerful. In this novel, the female protagonist, Honowoo Takasaka, not only had a system that allowed her to travel through the anime world, but she also had many goddess classmates, including Aoba Aoi, Megumi Kato, Ying Lili, and so on. There were also many people who fought with her in the book. Ichinose Hanami also appeared. I hope you like this novel. Muah ~