Auntie calls and she wants that Sunako scores 80 percent or higher on the coming math test. Sunako doesn’t want to cooperate, but the guys force her to study. Sunako has really high grades except for math, she doesn’t mind memorizing things but doesn’t like math cause she has to think for it. Kyohei challenges her to compete with him for the best score on the math test but Sunako admits defeat. Kyohei wants to prove to Sunako that as long as there is a will nothing is impossible and studies for the test by himself. Sunako studied the material Takenaga gave her, and the guys think she made it well, however she just learned all the questions out of her head and answered them in the wrong boxes.