HUNTC-107 You aren't getting hard, are you? Just kidding, I've already come… My little sister who's so disrespectful just came in seconds! My crotch being touched so casually by my little sister. To my crotch to…

My sister casually touches my crotch. The sensation that directly reaches my crotch makes me feel pathetic and sad, causing me to ejaculate in an instant! Moreover, I ejaculated so much that it left a stain on my pants… My sister noticed this and teased me by calling it 'little dick' while continuing to play with my penis, making me ejaculate again... However, seeing me ejaculate repeatedly, my sister started getting excited, changing the situation! The once arrogant sister suddenly became docile and began seriously seeking me out! Is my super sensitive premature ejaculation complex becoming a weapon?