My classmate Kagetsu Rinoka became my girlfriend. Both of us were shy and introverted, so at first, we didn't know how to act around each other. But one day, she suddenly invited me to a love hotel. Although we had only just started dating, she seemed already familiar with love hotels and appeared more mature than me. Her quiet, soft D-cup body actively drove me wild. The moment I innocently embraced her, our feelings as first-time lovers began to bloom.