Haruka Mitsurugi in Big Crisis!

A high school girl Haruka Mitsurugi has been transferred from other school for a certain purpose. She has performed great deeds in saving a girl student from being attacked by delinquents on her very first day at school. Haruka tells the girl she has saved why she has come to the school and secures the cooperation of her. However, the mastermind who is pulling strings of the delinquents starts to take aim at Haruka as well. The following day, Haruka gets attacked by the delinquents while changing into sym clothes. Although Haruka fights back, the accompanying girl gets taken as a hostage and Haruka is also taken by the delinquents resistlessly.