During a school trip, a dull boy takes a mixed bath with a plain girl with glasses (2 loners)! When she takes off her clothes, she is surprised to find that she has plump, big breasts and is super lewd! Since he has few friends, he is weak to pressure. He has no experience, but he has a lot of erotic knowledge. "In erotic manga, you wash your body with your breasts, right?" Even though he is plain, he is proactive in his play. He neglects sightseeing and has sex for 2 nights and 3 days, rubbing the double huge breasts and getting soaked! He ejaculates on her breasts, pussy, and glasses! Plump, plain, big breasts are the best!