The girl is the younger sister of Jiujiu in Black and White Detention Center. She is a relatively famous actress.
[There are some special ability settings, but they are actually useless in the text]
CP is Yue Huang Yao Dou
The timeline is the second season of Little Opera, after the girl falls in love with Nissan
This is probably the setting. It will definitely involve the black and white plot, and maybe there will be some other little easter eggs.
Last rule: primary school students' writing style, don't criticize if you don't like it