Starring Kuramoto Sumire, 'Rationality Exploded: Ejaculation Covered in Semen 20-Punch Group Sex Vol. 9' has become a repetitive experience that can only be enjoyed by repeat viewers, leaving a sense of dissatisfaction. The excessive exposure of male actors and insufficient filming of the female lead also require improvement. However, the sight of Sumire's slender body being sullied by men is immersive, and the on-the-spot ejaculation scenes are particularly erotic and attractive. Nevertheless, the press scenes make it difficult to see the male actors' movements, and the monotonous positions lead to quicker boredom, resulting in a low overall quality of the work. Although the internal ejaculation scenes are unvaried, Kuramoto Sumire's screaming is captivating, and the image of a beautiful girl turning into a meat toilet is worth a glance.