Rinne-chan, 20 years old, second-year university student. A slender yet strikingly beautiful woman with a mature allure, her perky breasts standing out, spends a languid afternoon with her close friend's male friend. The scene feels real as she shyly hides her embarrassment and says, "Huh, why are you hard!?" The moment her smooth skin's touch makes her lose herself, crossing the line with her close friend, her expression wavering between reason and desire makes your heart race uncontrollably.