一名沒離開過都市的美術系研究生因畢業畫作被教授退件,被教授強迫去偏鄉高中代課一個月,居住在當地並以戶外寫生的方式完成畫作。在偏鄉這位代課老師遇到了一名陽光瀟灑喜愛畫畫的高中學生,以教他繪畫為交換條件,要求這位學生必須每天清晨載送他去戶外寫生,但學生卻漸漸愛上了這名代課老師⋯
Art graduate student Yu Xing is forced by his professor to spend a month teaching at a rural high school as a substitute teacher in the hopes that the change of scenery will inspire Yu Xing and help him salvage his rejected graduation project. Upon his arrival, Yu Xing meets Xu Lu Hui, a cheerful high school student with a passion for painting but limited opportunities to pursue it. While their initial interactions aren't the smoothest, the two eventually strike up a deal together: if Lu Hui drives Yu Xing to outdoor sketch locations, Yu Xing will give Lu Hui private art lessons outside school hours. As they spend more time together and their bond deepens, Lu Hui begins to develop feelings for his substitute teacher. What will become of this forbidden romance?