She is an out-and-out good student who grew up under the influence of "learn mathematics, physics and chemistry well, and travel all over the world without fear", but on an ordinary night a month before the college entrance examination, she traveled through time... But what gave her an even bigger headache was yet to come. As an out-and-out science major, she felt the sadness of a novice in history...
He is a mysterious person, as white as the moon and as clear as the wind, never contaminated by any dust... It seems that he never cares about anything, but understands everything clearly. He once thought that he could smile like this and watch the flowers bloom and fall, living a leisurely life with nothing to worry about. Until his eyes met hers for a moment, he knew that he could no longer be an outsider...