Ep. 1: The adorable thief Saint Tail targets a valuable gemstone while being pursued by her classmate.

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Meimi Haneoka is a 14 year old student who transforms into the phantom thief Saint Tail after dark. Saint Tail announces her intention to steal the Blue Meteorite, a specific gemstone. Unbeknownst to her, Asuka Jr., a classmate she has feelings for, has been appointed to lead the task force dedicated to capturing her. This creates a situation where the thief and her pursuer are intimately connected in their daily lives, setting the stage for a conflict between her criminal activities and her personal relationships.