Save Me! Lollipop

When she mistakes a crystal pearl for a piece of candy and eats it, fantasy-prone seventh-grader Nina suddenly encounters Zero and Ichii, otherworldly sorcery students sent to Earth to locate and retrieve the gem. Now, Nina's dream-come-true heroes must prepare a complicated potion to remove the pearl from her body -- and in the meanwhile protect her from other magic students who would use ruthless measures to get the jewel for themselves.