"Lesbians are getting younger." Mio Oshima, First Undercover Investigation & First Lesbian! Since her mother is her investigator, Mio has been brought up strictly to become an investigator herself. One day... Her Mio's first mission is decided. Her infiltration destination is Vivian Jogakuen, and her target is the student council led by Ayuna Nijiren. It was Mio who became a student and infiltrated the school to find out why there is so much money that cannot be explained by JK business alone.
