I work part-time at a convenience store. One day, when he was about to go home after work, he couldn't go home due to heavy rain... Then Yuuri, a bright and short junior who was working on his shift and was like a younger sister, decided to let him stay at her house. After coming home dripping wet, Yuuri changed clothes behind me... At that time, I caught a glimpse of her big breasts that I couldn't imagine from her clothes... Moreover, Yuuri seduced me by attaching her breasts to her arm. I've been...