How to School: A Textbook for Better Sex, Beginner's Edition

This is a how-to AV that can be called a textbook on sex and can be both educational and fun. In the beginner's section, a wide range of topics are explained, from the basics of sex, which everyone learns together, to the most powerful cunnilingus, the best cunnilingus method, insertion techniques that allow penetration of the vagina up to 2cm deep, and Nakayuki Sex (sex with a man inside a woman). The story depicts Mr. Haruhito Moribito and Ms. Hibiki Ootsuki as instructors, with the actresses playing the roles of their students. The characters and structure of the video are fun and easy to understand, making it a useful video for both men and women. I am looking forward to watching the intermediate level version, since the quality is so good for the beginner level.