She is a down-to-earth scholar who is deeply involved in the field of ingredient extraction. She just wants to focus on studying for the Ph. D. And live a stable life, but she accidentally falls into the affection of a paranoid man. He is a big boss behind the scenes, ruthless and cruel to the outside world, and he plays tricks on every occasion, but he is exceptionally gentle and presses her every step of the way. Although they are nine years apart and have a very different love history, he claims that he has never been so serious. A project promotion meeting that deliberately staggered her exam time, a serious question from her father, and a "whim" that she unilaterally identified as hiding his unspoken distress and forbearance. When the sobriety of the realist meets the persistence of the paranoid, when she desperately draws a clear line, he has already laid a gentle trap. This pull started from an accident. Who was moved first, and who lost the battle first?