The case was registered against Lalit (21), who works at a medical store, yesterday following a complaint by the class XI student, they said.
According to the complaint, Lalit, who often used to tease the girl, had forcefully took her to his friend Gaurav's house and raped her last month.
He also clicked obscene pictures of hers and threatened to upload them on social media.
Using the pictures, Lalit again raped the girl and threatened to kill her if she files a complaint against him.