My vote is for the poly harem route, that ends with her in the middle of a giant orgy with all the girls.
I have this suspicion that the President will barge in this "fight" and stop them and then proceed to claim the MC is her lover.
Oh man!This means I have finally become a popular girl!And then,After one week,You're making me blush.This feels pretty good.Use that time to consider between me and Kamisada carefully.You'll have to choose either Kamisada or me to be your girlfriend."Don't fight over me."One week.Eh?To think I could ever say such a wonderful line...