(OC) Lena Wagner is a pureblood Slytherin. It's now her sixth year, she's antisocial, and prefers studying over making friends. But when a certain Gryffindor quidditch player, James, catches her attention, she can't keep away from falling for him. Though during a tough break in their relationship, Durmstrang and Hogwarts have an exchange progam, in comes Dimitri.