Haruki and Motoki are third year high school students. For the spring break assignment, "Character Document Essay", he was tracking the vice president of the student council, Chisato, in order to uncover her sexual tendencies. One day, he sees a woman selling the lactic acid bacteria drink "Yokul" in the line at the bus stop. The two become interested in the woman who is wearing her uniform and attracting the attention of the office workers. They change their target from Chisato to a female lactic acid bacteria drink salesperson and begin tailing her...