I've been working for two years at a women's beauty salon equipment manufacturer, and I've been making constant mistakes and I'm still unable to give up and continue working, thanks to Kato-senpai. She was beautiful, kind and able to work... and eventually she began to admire her senior, who was a Madonna figure at work. This time, I decided to go on a day trip alone with my senior. However, due to my mistake, I suddenly had to stay overnight... and somehow I ended up staying alone in one empty room I found...