Mysterious Thief Saint Tail appears!But Officer Asuka, Asuka II and a large number of police officers failed to catch her... The next day, the girls in Haigaoka Meimi's class were discussing this “Phantom Thief St.Tail” who specializes in stealing treasures from evil gangsters.At this time, Asuka Ni, a classmate who claimed to be a “detective”, seemed very dissatisfied, and had a quarrel with St. Tail's “self” Amei... After school, Amei went to the church to find her friend Shensen who was a trainee nun.Shengliang saw a little girl, and it turned out that she was praying to God for salvation for her grandfather.This little girl’s grandfather is a gemstone appraiser. When he was identifying sapphires, green tektites, and emeralds for Mr. Haitang, he got greedy and identified the counterfeit gems as genuine, and then bought the real gems that were identified as counterfeit at a low price.Come down... So Yamei wants to exchange the gems for this repentant appraiser this time.Because the gemstone had been sold by Mr. Haitang, the strange thief St. Tail went to the buyer's home, and unexpectedly found that the green meteorite% had been stolen!St.Tail found out that it was Mr. Haitang who stole it back... The next day, Meme decided to go to Haitang's house to complete the task; on the other hand, Asuka II studied the gem theft cases that occurred in the past month and determined that the thief St..Tail's next target must be Haitang's house, so he went to investigate privately, but accidentally triggered the alarm bell, which alerted Officer Feiniao who was on duty.At this time, the Phantom Thief St. Tail appeared!She used magic to conjure a lot of St. Tail dolls. She took the opportunity to get rid of the police, found Haitang's safe and exchanged the original gems for them, and subdued Haitang and his accomplices who were chasing after them.Asuka II, who followed, saw Haitang's gem and realized that he was the criminal who stole the gem. When Haitang heard Asuka telling him about his crime and was about to attack Asuka, he was knocked down by St. Tail.When St.Tail was about to escape, Asuka wrapped her feet with a rope, causing St.Tail to fall onto Asuka!Asuka then discovered that the thief St.Tail seemed to be a girl about the same age as him... The next day, in order to thank Asuka II for helping the police catch the gem thief, the mayor granted Asuka a search warrant so that he couldConduct searches freely within the city and appoint him to hunt down the phantom thief St.Tail...