Summer has finally arrived for Takahashi-sensei and the demis, and they're determined to make memories despite their challenges. From telling scary stories to finding creative ways to cool off, the girls always have fun in their own way. When Takahashi-sensei gets the chance to reserve the school pool for demis only, he's able to give them a taste of the normal summer experience they've been looking for... but he may not be ready for a new level of sexiness from Satou-sensei! Meanwhile, a new demi appears on the scene. What adventures will she bring?