The president of the Science Club, Sai Suzuzono, is a girl with a mad scientist-like temperament who spends her days satisfying her curiosity with weird experiments and inventions, not thinking much about the trouble it causes to the people around her.

The only one who can keep Sai in check is the class representative, Ren Nagakura. However, despite her Class Rep character, Ren is a bit off (in other words, an idiot) and so the situation always takes an unexpected turn...