My parents decided to go on a trip to celebrate their wedding. Naturally, I couldn't keep up, so I ended up spending a week at my aunt's house in the countryside. I was hiding my feelings for my aunt Yuka, who had been beautiful for a long time, and concentrating on my studies, but one day, when I was spending time at home with Yuka, it suddenly started to rain. When I was hurriedly taking in the laundry in the pouring rain, the figure of Yuka, who was wet and had transparent underwear, appeared in front of me.