Haruka Shibazaki, in her second year at the Merchandise Department, is more pure and sincere than anyone! She has backbone! Her karate is black belt level, and she's also a calligraphy master. And the gap between her appearance and reality is insane! Sex with her was super erotic… She loved kissing, fellatio, penetration, and everything deep inside… For the development of a new product, a masturbation sleeve, she makes a decision to analyze her own vaginal data as sample data...
