Haru Shibasaki, a second-year in the goods division, is more pure and sincere than anyone else! She has a strong core! She has a black belt in karate and is also a calligraphy master! And the gap between her appearance and her personality is crazy! Her sex was super erotic...! She loved kissing, fellatio, penetration, and deep penetration... In order to develop a new masturbation toy product, she made a decision to analyze her vagina as sample data...