"It won't do if you don't wash it properly!" The older sister, who always treats me like a child, gently and carefully peeled back the foreskin of my phimotic penis and cleaned it thoroughly! (Kitano Mina ROYD-372)

I have an older sister who is much older than me and very beautiful, but she's incredibly meddlesome. Even though I'm in high school now, she still treats me like a child. She interferes in everything from my studies and personal life to how I bathe. Whenever she sees my phimotic penis, she says, "You can't not wash it properly! You won't be popular with girls like that!" Then she peels back the skin and tries to clean me! She's already beautiful enough, but her touch makes my penis instantly hard, turning it into an adult erection! At first, my sister was surprised, but gradually, as she excitedly started moving her hands, I felt so good that I ejaculated directly onto her! I thought I was in trouble, but to my surprise, when my sister saw my growing penis and the semen, she became aroused. She showed an incredibly erotic expression I'd never seen before and said to me, "Hey… let's do something even more adult!"