Out of pure curiosity, 19-year-old Amami Kokoro opens the door to the forbidden world. "Does creampie feel good?" is the innocent question that begins her first creampie experience. She welcomes another man into her body for the first time, and is shocked by the release of hot semen deep inside her. At that moment, surprise and ecstasy at the unknown pleasure fill her eyes. The fresh body of a 19-year-old is transformed into that of a mature woman by the contamination of semen. This is a valuable work in which a young girl's ignorance is rewritten through an education in pleasure.