A very popular series that observes and thoroughly examines Amateur men and women! This time, "Has your girlfriend been cuckolded without you even realizing it?" We monitor the whole story of her being cuckolded through a soundproof one-way mirror! Under the pretext of a cuckold awareness survey among couples walking down the street, the boyfriend and girlfriend are each put into a space separated by a soundproof one-way mirror! The boyfriend's figure is completely visible to the girlfriend through the one-way mirror! She notices something strange and cries out, but her boyfriend doesn't notice, and she is raped by a big-dick man in front of him!