Mai is invited by an older man she meets in the park to teach him how to kiss like an adult. She can't forget the excitement she felt, so she starts visiting his house, and he uses not only his lips but also his body. She is then surrounded by other adults who are the older man's acquaintances, and is toyed with until she is covered in saliva and semen. Through passionate kissing, licking, and swallowing saliva with the older man, the young girl learns the taste of adulthood.