It means the best couple of Gensoukyou.Even if you didn't vote...A sudden attack!!...me and Seiga are already the best buddies in Gensoukyou, are we not?It's a popularity vote.All right, voting complete.Seiga, what are you doing?Since we got a Best Partner session this time, I'm voting for you, Yoshika.Be-su-to Pa-to-na?
Since Yoshika doesn't understand the word.Yay, best buddy with Seiga!! I vote!!