In Equestria Girls: A Change Of Heart, The Main Eight are at school in Valentine's Day. A magical mishap happens that stirs down the love.

It is Valentine's Day at Canterlot High. Joy is being spread out all around others. The beauty of love is in pure bloom. But something in the air happens that doesn't feel right. It all starts to fade away as students begin being completely drained of their energy sources. What could be causing this energy vampire conundrum?