Finally, Kurinaka also allows 'internal ejaculation'! The feeling of raw sex is so good that she begs for internal ejaculation to climax together, and he agrees with a smile. The sensation of hot semen being released deep into the vagina, the glans swelling to its maximum just before ejaculation, sperm dripping from the vaginal opening to the anus... The feeling of doing something forbidden also maximizes the eroticism. With continuous piston thrusts leading to multiple orgasms, and not removing the ejaculating penis but instead counterattacking with continuous internal ejaculations... A female in heat cannot be stopped by anyone!
