FNS-253 — To escape a sudden downpour, a male and female classmate sneak into the school building at night, only to find themselves alone together... As they warm each other's soaked, see-through bodies, they become entangled. - Yayoi Hamabe

College student Yayoi returns to her hometown for summer vacation. There, she reunites with old friends and throws a takoyaki party. The boy she's always had a crush on is also there. After the party ends, Yayoi and he are going in the same direction, so they walk along a familiar street together. Suddenly, it starts to rain. They take shelter in their old school. They sneak into the school building through a window that has always been unlocked. Even though it's summer, their wet bodies make them feel cold. As they huddle together to keep warm, their bodies naturally become intertwined. Their feelings for each other from their student days explode, and they continue to have sex even after the rain stops, reminiscing about their memories.