Kaede Kasuga

A teen girl who got very interested in matter of sex and the opposite sex, Kasuga starts behaving strangely, and becomes too preoccupied with calculating the total number of penises and balls in the class to pay attention to class or test. Although reluctant for a moment, she is quick to realise the opportunity that Kobayashi's bet provides for her to fulfill her desires, with which she is very honest. Despite not being entirely unashamed, she she is straightforward with what she wants and initiates most of the couple's escapades.