'Mihoshi Ruka' decided to graduate from virginity at the milestone of 20 years old. An innocent smile, witty answers, and behavior on set that shows the height of femininity... A beautiful girl who really doubts if she's a virgin loves erotic manga and anime and has a wealth of knowledge. "I learned masturbation when I was a middle school student..." The first sex that a sullen daughter challenges with her body... Curiosity, anxiety, latent eroticism intertwine, virginity loss work that gives a glimpse of high potential!