Female college student "Tsubasa" from Okayama comes to Tokyo, and on her first encounter, ends up listening to a man's personal troubles. Hearing he had no experience with women, she is initially shocked by his large cock, but at just 18 years old, her youthful curiosity quickly takes over. Though shy at first, she actively touches it, gripping and sucking with growing eagerness, eventually progressing to full vaginal penetration. A genuine amateur experience capturing pure curiosity and youthful spontaneity, unfolding in a realistic and compelling way.