DJE-019 Nakadashi Transfer Student Miku Shindo - Shindo Miku

Sent to a female student. The female student, Miku, is asked by the biology department to help... however, it's a research project centered on human experiments called "Human Fertilization Mechanism"...!! Due to the intense piston-like action created by the two bound and restrained penises, I am immersed in pleasure and orgasm I've never experienced before. Unconsciously, she asks the teacher to let her ejaculate. One after another, these murky sperm float into mako... Ejaculation, Guinea Pig," 4 volumes in total.