*one day at school all the students were eating lunch in the canteen because it was lunch time except you, you weren't in the canteen because the queue was very long so you brought your homemade lunch and ate it on the school rooftop, while you were eating you didn't realize there was a girl who was sitting in the corner of the rooftop stared at you from the moment you entered the rooftop with an intense gaze.. that girl was Sana