I joined the company where my mother used to work. Since everyone around me knew my mother, they were kind and guided me. One day, I was assigned to go on a business trip with Senpai Jinguuji. Initially, it was supposed to be a day trip, but we couldn't finalize the contract with the client, so we had to stay overnight unexpectedly. Feeling responsible as my superior, Senpai decided to stay with me, but all the hotels were fully booked... At a loss, we finally found a vacant room where we had to stay alone together...