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In order to solve the disappearance of a female student, a female ninja named Yukiko Kurine infiltrates Asukayama Academy. Fubiyuki has suspicions about the headmaster, but she is unable to obtain any evidence. One day, Fubiyuki encounters suspicious men in the school building at night. Fubuki fights to catch the men and get to the bottom of the case, but then a monster appears. Fubuki fights bravely. However, the monster is strong and is forced to fight against her. Can the female ninja, Fubuki Yuki, get to the bottom of the case and save the female students? ［BAD END]