the summer days that have passed, the disappearing rural scenery, and the three long yet short years of being a high school girl. Surrounded by mountains and rivers, the land of Tochigi. The energetic summer that passed in an instant. The original rural landscape that is gradually disappearing due to urban development. Hurrying through the sensitive youthful years. However, it is precisely because of such a place that nostalgia remains, noticing the strange masochism, without being able to confirm whether it is good or bad, indulging in lazy sex. A single ray of light that happened in the final summer that cannot be told to anyone, what does it mean to her? Only the widely opened anus knows the answer.