I ended up staying at my cousin "Misono nee-chan's" place, heading over with a mix of shyness and excitement to see her again after so long. Our parents were classmates back in school and still live in the countryside, while their friends are in Tokyo—today they've come to the city for a reunion. I've moved out from my hometown and live alone, and maybe because of that, seeing Misono again feels a bit awkward, yet she treats me just like she used to—playful, warm, and close. In front of her, my teenage body reacts uncontrollably, my crotch swelling with growing awareness. Noticing my state, Misono seems to sense something, and slowly, her demeanor begins to change…