When Sasami was very young she promised her parents that she wouldn't use her magical powers - though as a young girl, she sometimes does an innocent deed regardless. Sasami always has a positive attitude and likes making new friends such as the timid Misao, and loves to cook. However, when the Cooking Club's leader - the new teacher Ms. Washu - seems insistent on making the girls prove their worth, they soon discover that the club is just a front for the Magical Girls Club! It seems that Ms. Washu is actually here to make sure any magic-using girls use their powers responsibly. Along with Misao, Makoto, the rabbit-like Ryo-Ohki and other new friends, Sasami trains hard to be the best Magical Girl she can be!