A sweet romance between editor Lu Yun Zhi who has a strict timeline for everything and the quirky He Zhen who is a serious procrastinator. Lu Yun Zhi is the star editor of a publishing house. He takes pride in his flawless working style and cares a great deal about maintaining his public image. While he tries to appear mature, he is just like a child who can feel happy over the smallest compliment and throw a chair in frustration at the smallest mistake. He Zhen is a girl with eccentric ideas. She's turned into a night owl from spending her time writing her novel. Her days and nights are a blur, her life chaotic yet she's the type who doesn't care about appearances. This is the story about the highly disciplined editor and the energetic writer. Adapted from the web novel "Love is an Open Door" (恋爱生物钟) by Su Yi Shan (苏一姗).