A virgin brother who came to Tokyo for exams is given a gentle lesson in his one-room apartment by his sister! "You can't have sex, but I'll teach you how to kiss!" As she lectures her brother, who has never even kissed before, his virgin dick gets fully erect! Covered in saliva, they entwine their tongues many times, and the sister's libido is ignited by a long-awaited French kiss! They can't stop kissing while their uteruses are stirred up! Their tongues move as their desires dictate! They go beyond the relationship between brother and sister and have incestuous sex with a creampie!