On a rainy day, I finally had a girlfriend and went to her house to play. There, I encountered an older sister with a see-through shirt showing off her breasts! She was the complete opposite of my girlfriend, with a style like a gravure model... Then, the older sister started flaunting her chest to seduce me!? Seeing such a great body, there was no way I could hold back. I easily betrayed my girlfriend and lost my virginity...
