My parents were going on a trip for their wedding anniversary, leaving me, a college student, behind. They decided that I would stay at my aunt's house in the countryside for a week... As always, I had secret feelings for my beautiful aunt Yukari, but I tried to focus on studying instead. One day when we were alone together at home due to heavy rain, her wet clothes clung to her body, revealing her see-through underwear, causing my heart to race with desire...