Sae, a fourth-year university student, hasn't secured a job yet and remains uncertain about her future goals—and also about what she truly wants in a man's cock size. She decided to appear in an AV as part of her personal research to clarify her standards, but during filming, a shocking truth comes to light. When the male actor inserts his fingers into her pussy during foreplay, he's stunned by how incredibly tight she is. Although Sae has a boyfriend whom she believed to be premature, it turns out he climaxes quickly because her pussy is abnormally, unbelievably tight. Realizing her own potential, the "fucking tight-pussy Sae" shyly spreads her legs in front of the camera, moaning passionately as she's fucked by a bigger cock than her boyfriend's, her nipples rock-hard and erect. Watching her, you'll undoubtedly find yourself whispering, "damn, so tight."