Trying to finish the documents for tomorrow when suddenly a heavy rain poured down. Without an umbrella and with the trains stopped, I had to stay overnight at the company. While working, Hikari-senpai rushed in. It turned out she had forgotten her things and came back to get them, but the heavy rain made her completely soaked. So both of us were stuck here together. Her thin shirt clung to her body, revealing her pinkish white skin, and her sexy black lingerie. As I was admiring her, suddenly there was a thunderstorm, and Hikari-senpai hugged me tightly! The scent from her body, her smooth skin touching mine made my mind seem empty. I couldn't help but strongly inhale this scent, touching all the seductive curves on senpai's body. When I regained my composure, I realized how wrong my actions were. Just as I was about to stop, Hikari-senpai changed, she no longer resisted, timid as before, but even actively seduced me! And then we made love all night, our wet bodies soaked in sweat and rainwater mingling together until the next morning...