In Sasami's PE class, eveyone must jump over a vaulting box in order to get a good grade.  Misao can't and so Sasami help her with the aid of another student overcome her fears.  The next day, however, another level is added to the box making it higher.  Misao runs off and she turns into Pixy Misa who then makes the vaulting box into a love love monster.  Pretty Sammy must defeat it so that class can resume.