The older sister at the top of the social class, after being dumped, took her anger out on me (her younger brother), practicing everything from oral sex and penile stimulation to internal ejaculation, a slut training session involving 15 excessive ejaculations. (Ono Rikka MIDA-689)

Rikka, the older sister who should have been perfect, was rejected because of "lack of skill"! Her self-esteem shattered, she took her anger out on her "socially awkward and withdrawn younger brother's" penis, whom she considered inferior! Thus began a 24-hour obsessive training regimen that abandoned all reason. Early in the morning, she would shout, "Lend me your penis!" and bite down hard on his crotch, performing oral sex and licking his testicles, making lewd noises as she frantically sucked! She would raid him at night while he slept, secretly engaging in reverse sleep rape! What started as practice unknowingly turned into her brother's penis becoming addicted, using seductive expressions to seduce him and displaying an astonishing transformation…!? Finally, there was a relentless, unstoppable internal ejaculation! A depraved pursuit of a perverted woman's training!