[HUNTC-601] My serious club girl's younger sister quit and her sex drive exploded! Instead of exercising, I did training! When my sister, who was so focused on club activities, retired, she had so much stamina and libido that she drowned in masturbation every day! She relieved her stress! But her lust that couldn't be satisfied by masturbation alone was directed at me, pushing me to climax over and over!

My sister was obsessed with club activities every day, doing morning practice and after-school practice. My serious sister, who was so devoted to club activities, retired. While active, she relieved stress through club activities, but after retirement, she tends to shut herself away in her room. When I peeked inside, I saw her repeatedly climaxing from brutal masturbation! Her excess stamina was lost and turned into a rampant lust? When I secretly peeked at my sister, she got caught, and I hurriedly apologized, but something was wrong... In fact, masturbation alone was enough to satisfy my sexual desire, and she was venting her lust at me! With my sister, who had too much stamina and sexual desire, I was pushed to climax again and again, drenched in sweat! She overused my penis, which is bad at exercise and below average... Please give me a break!