Two months after the failed science fair, another event is just around the corner. And this time, all the planning is not the teacher's responsibility, but the students! However, the arduous, yet fun project becomes a little more challenging when the Powerpuff Girls and Rowdyruff Boys are forced into working together. Tensions were already high between them, but they grow even higher as the boys get a hint that things weren't what they seemed back then, and the truth might be far more different than they realized. Will they find out about those forgotten memories, or will they decide that ignorance is bliss?