I've been working at a food manufacturer for two years. Even though I'm always getting scolded, Hikari-senpai treats me kindly. I was happy to be able to go on a business trip with her, even if it was just for a day. However, due to a problem with a client, the meeting was canceled. Since it was an important client, we decided to stay overnight and try again tomorrow. As misfortune continues, we are caught in a sudden heavy rain and the nearby hotel is fully booked. We finally find a vacant room and the two of us end up staying alone...