FSDSS-099 Immersed in lust with their younger sister

Nene, my younger cousin who always plays with me, moved to the city with her family many years ago. Today she returned to her hometown and stayed at my house. The girl who used to secretly love me has now become an extremely beautiful city girl. In the sweltering heat of summer, the sweat soaking through her clothes accentuates Nene's smooth, white skin. I could barely contain myself. At night, my mind was filled with images of Nene that made it impossible for me to sleep. Even though I knew this was completely wrong, I couldn't control myself anymore. I secretly approached Nene, crawled under her blanket and made love to her, despite my parents sleeping right next to me...