Ballroom dance school, Shiratori Dance Academy. One day, Shiratori-sensei asked Yamamoto, the youngest student in the class, if he wanted to try competing in a competition with Goto, who was about the same age as his father. Shiratori's merciless Spartan lessons begin on the bewildered couple Yamamoto and shy Goto. When the two were about to give up, Shiratori came up with a ridiculous idea.