Wait...that ending...So she really IS an alien? I figured it was just her plan to get into a sweet, vanilla relationship with her teacher...
...Still, if aliens are like her, I think most of us would welcome an invasion...
I know right? Most of the time we expect the simple "play on circumstances" but honestly being shown that WAS the real case was a nice surprise! Does maybe explain her intense drooling habit though! Haha.