PGD-847 Seduced by the older sister I admired who was about to get married... Yui Hatano

My childhood friend Yui-nee-san is about to get married. The person I married was also my older brother who lived in the neighborhood and treated me like my own older brother. The two of us were supposed to be a good match, but I couldn't congratulate them from the bottom of my heart...One day, my sister showed me her true face that she had never shown to anyone else. Her appearance was unbelievably slutty compared to the usual neat and innocent Yui-nee... ``I'm going to marry that person, but I'm going to have lots of sex with him.''