In the peaceful Jindai High School, a transfer student suddenly appeared in front of Chidori Kaname, who was living an ordinary high school life. This transfer student named Sosuke Sagara actually followed her everywhere, whether at school or at home, and wherever he went, he would cause quite a commotion. In such extraordinary daily life, it was time for their class to go on a graduation trip, but they encountered a hijacking incident, and the target was actually Chidori Kaname. In the critical moment, Sousuke appeared to save her. What is the true identity of Sousuke Sagara, and who is the mastermind behind this hijacking incident...?
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