Hoshi no Otome to Rikka no Shimai | 星の乙女と六華の姉妹

The protagonist, Yamabuki, is a popular video distributor with cute looks. She has been attracting attention as an up-and-coming female vlogger, but she is actually a man. She plays the role of a woman in her videos for the sake of her bad sister, Arisu Yamabuki and gains popularity.

One day, Arisu's mother becomes concerned that she is no longer attending school and tries to force her to transfer to a certain school. The school that Alice will be attending is St. Rokka's Academy, which has produced many top idols. The school is a ladies school where men are not allowed to enter, even if they are family members.

My sister was relieved that it was finally time to pay her dues, However, she is asked to take care of Arisu by dressing up as a woman and taking the entrance exam.

She thought this was absurd, but Yuki had been a child actress in the past, She is irresponsibly entrusted with the job, thinking that she can handle it.

When Arisu says that she'll attend the school if she's with Nini, she reluctantly agrees to dress as a woman.

Then came the entrance exam. She changes her name to Usami and plays an active role as a woman, and successfully passes the exam.

And so, Usagi goes to the idol girl's school dressed as a woman. What awaits him (her?)? What awaits him (her?)?