Third year editor Tsukamoto Takahiro spends most of his time reading novels by Setoguchi Itsuki. Takahiro is in charge of Itsuki while his senior is on maternity leave. However, what was supposed to be the best time has turned into something else due to his new neighbor. Their first impression of each other was the worst, yet they also both come to the realization that they are actually rivals in love! Under such circumstances, Takahiro couldn't believe who appeared during his meeting with Setoguchi-sensei!