3rd year editor Tsukamoto Takahiro spends most of his period reading novels by Setoguchi Itsuki. Takahiro is definitely in charge of Itsuki while his senior is on maternity leave. However, what was supposed to be the best time provides turned into something else due to their new neighbor. Their very first impression of each other was your worst, yet they also each come to the realization they are actually rivals in like! Under such circumstances, Takahiro couldn’t believe who made an appearance during his meeting with Setoguchi-sensei!