An otaku brother who is daily tormented with a nail bat and teased by his delinquent sister. One day, he seeks help from a close friend from middle school days, but his head gets blown off by his sister's nail bat... The brother, burning for revenge, finally attacks his delinquent sister! His sister reaches orgasm as her uterus is stimulated by the brother's frenzied punch to the stomach, it's too erotic w
