I had come on a day trip to take a contract that would determine the fate of the company with my admired superior, Mito-senpai. However, we were unexpectedly thwarted by a rival company. The president, furious, told us not to come back until we secured the contract. At a loss, we decided to look for a hotel for the next day's visit to the client. But there was a hugely popular idol concert nearby and all the hotels were fully booked. Finally, we found one empty room and I ended up staying alone with Mito-senpai...