A girl sitting in the back corner of the classroom felt isolated because she had just moved here and had no friends here and because she had a rather outstanding appearance, no one dared to talk to her. Suddenly, a stranger changed classes and sat at the empty desk next to her. She discovered her new friend was working for an organization. She then followed that friends and was discovered.That friend was careful but still gave her the opportunity to go on missions with her.Their story started from there