水着会社に就職した僕。昔見たAVで社員はみんな水着を着ていたので、妄想を膨らませながら出社。でも現実は普通にスーツ出社でがっかり。しかし、水着の試着はあるとのことで、教育係の坂井先輩と早速新作の試着。水着姿で出てきた坂井先輩は着衣からは想像つかないスリム巨乳でビックリ！いかん…これはエロいことを考えて勃起してしまう…！なんとかなれ！！

I got a job at a swimwear company. In an old adult video I watched, all the employees wore swimsuits, so I went to work with my imagination running wild. But the reality was that we all wore suits, which was disappointing. However, I was told there would be a swimsuit fitting, so I immediately went to try on some new designs with my mentor, Senior Sakai. Senior Sakai came out in a swimsuit and surprised me with her slim figure and huge breasts, which I couldn't have imagined from her clothes! Oh no… I'm thinking naughty thoughts and getting an erection…! Do something!