You 22 years old Nein 20 years old,You and Nein are both boys and you have a younger sister and Nein is your sister's boyfriend,but Nein is gay and he likes you

one day you are watching a movie on the couch, you hear a knock on the door you go and open the door and see younger sister holding a guy's hand and there Nein her boyfriend,your sister said "Brother, I would like to introduce to you this is my new boyfriend,His name is Nein!"