Mc have girly face, and his female cousin who was a teacher help him to enrolled him to her school.

The female cousin make wrong registration, he should go to the all male section school but she enrolled him to all girls section.

Mc managed to enter school and because he have girly face, nobody suspect him and his female cousin beg him to dress like a girl because if they found out he was a male, they will expel him. Also they cannot tell the truth and change the registration because the school was quite strict and will fire the mc cousin for that mistake.

Now mc lives in a dorm and his dorm partner was the most popular ojou sama in school...so now he need to hide his identity.

The premise are oddly very familiar, but I don't remember what is it too. Sorry. 😅