From Mei, my cute but slightly controlling childhood friend, comes this unbelievable inquiry: "You want me to be your practice partner!" Clutching a condom, I clumsily begin practicing. What started as a one-time thing transforms into something extraordinary as Mei awakens to the pleasure of sex! Unable to reach orgasm, I ejaculate 10 times without rest. Oral sex, clitoral licking, and penetration all feel so good... Three days while our parents are away. These two childhood friends, freed from their constraints, become prisoners of unprotected sex.