There is an athletics carnival coming up, but Rini can't jump over the vaulting horse, which will be in the obstacle course. Kelly, an athlete in Rini's class, is also unable to jump the vaulting horse, as he has been afraid of it ever since the time he tried to jump over it, and crashed into it. Jun Jun teaches him how to jump over the vaulting horse, while Serena and the others teach Rini. When Jun Jun discovers that Kelly is the next target, she creates an illusion of a fence on either side of him, and a bear chasing him, and while running from the bear (which he does not know is an illusion) he jumps the vaulting horse.
Jun Jun then shoots her dark green orb at Kelly and extracts his dream mirror, which is not the golden mirror. Serena and the others transform and arrive to fight her. Jun Jun summons a Remless named Jumper to fight them. Jumper eats Kelly's dream mirror. After a bit of a fight, Sailor Mini Moon jumps over Jumper as if he were a vaulting horse, knocking him to the ground. She then uses Crystal Twinkle Bell to summon Pegasus, and Sailor Moon uses Moon Gorgeous Meditation to destroy Jumper, releasing Kelly's dream mirror.
At the obstacle course, both Rini and Kelly are able to jump over the vaulting horse.
- First appearance of Kelly
- First and last appearance of Remless Jumper