This winter, Ruru came back to her paternal hometown. She sees her uncle asleep on the veranda. His crotch is erect due to a simple physiological phenomenon. Iru, who has no sexual knowledge, is curious and touches his crotch out of curiosity. She takes off his trousers, touches him directly, and Kokoro strokes him, causing him to ejaculate. Before she knows it, her uncle has woken up and noticed. Since then, the perception that "Ruru is a naughty girl" has spread among her uncles, and Ruru has become the target of middle-aged men...