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Due to my parents' circumstances, I had to transfer schools, and it was my first day at school. I nervously entered the classroom, only to find that it was a regular class with cute girls. However, after the opening ceremony, everyone started changing into swimsuits, and I was forced to change as well, and class began in my swimsuit. Seeing this unexpected turn of events and the sexy swimsuits, I couldn't contain my erection. Kiyomiya couldn't bear to see me like that, so she gave me a handjob. From that day on, I got erections during class, and we had sex during breaks...