This felt like it was the intro to the next season. The story is as follows, the Maken-Ki gang have gone to the beach to do 'training'. During their 'training' they encounter unexplainable enemies who have the power to drain their elemental powers. Everyone including Takeru come together to defeat the enemy but no one seems to notice the shadow lurking in the background. Of course you will have flashes of oppais for fan service and censorship will be bought down a notch as it is an OVA. But all in all it was good and it gave promise for a season 2.