My parents decided to go on a trip to celebrate their wedding. As a ronin student, I naturally couldn't follow her, so I ended up spending a week at my aunt's house in the countryside. I tried to hide my feelings for my aunt Yuka, who had always been beautiful, and concentrated on her studies, but one day, when I was spending time with Yuka at home, it suddenly started raining. Come... As I was hurriedly taking in the laundry in the pouring rain, Yuka's wet, transparent underwear appeared in front of me...