When she met him, he was a freshman and she was a sophomore. Because of an experiment, he became her senior brother. She always liked to call him: Second Senior Brother. There was always a pause there. He corrected him many times, but she didn't listen.
She lives on the sixth floor and he lives on the first floor. She can see a corner of his balcony from her bedroom. What she likes most is watching him turn on the lights at ten o'clock every night...
This is a story about secret love. He is her Jiang Haowen, will she be his Su Yi?