How Did I Become My Sister?

Ye Baixuan, a freshman in high school, is a serious girl-controller! But Ye Baixuan has no sister at all, which is also a common problem among most sister-controllers. The girl who was looking forward to the sister she couldn't get turned out to be her own sister by accident. Now that she has become her sister——Ye Baihe! Then where did the original self go? Scare! After becoming a younger sister, Ye Baixuan actually had a brother who looked exactly like his old self and had the same name! What will happen when you face a brother who is exactly like you?