Two years after joining the cosmetics company, I was on a day trip with Muto-senpai, who is older than me. Muto-senpai is beautiful, good at her job, and is the female boss I admire. However, a business deal with a client did not go well, and I had to stay overnight at the last minute. Unfortunately, all the hotels were fully booked, so I managed to find a vacant room and stayed alone with Muto-senpai. As we drank and chatted with each other, Muto-senpai's lips suddenly touched mine. I was hit by a numbing sensation and was unable to resist...