飯山 ユミ

Masaki's step-sister and girlfriend. As the captain of the women's lacrosse club with a big-sister personality, she commands deep respect from her juniors. Moreover, she reigns supreme on the academy's “Top Girls to Lose Your Virginity To” ranking among virgin boys, boasting a wide network. Though she defeated the nymphomaniacs (the Tategahana sisters) in the previous installment and claimed her beloved Masaki as her own, once again, temptations reach out for Masaki... [From official site]