My sister, who used to be a dedicated club member, has experienced a sexual explosion after retiring! She uses my penis instead of exercise for training! After retiring, she has excess energy and libido, and spends her days masturbating to release stress! But masturbation alone isn't enough, so she releases all her sexual desire on me, driving me to climax multiple times! HUNTC-601

My younger sister, who spent every morning and after school immersed in club practice, finally retired after her dedicated participation. While still a club member, she used the club to relieve stress, but after retiring, she often locked herself in her room. I secretly peeked in and found her intensely masturbating, repeatedly reaching orgasm! Her excess energy, having nowhere to go, had transformed into a rampage of sexual desire? I was caught peeping at her and hurriedly apologized, but her reaction was strange… The sexual desire that masturbation alone couldn't release, she released entirely on me! My sister, overflowing with energy and sexual desire, repeatedly brought me to climax, drenched in sweat! I, who am not athletic and have below-average physical strength, had my penis thoroughly manipulated by her… Please, have mercy on me!