Takuma, who has been living as a NEET for years, flies into a rage after being mocked by his younger sister, a high school girl. To punish his virgin slut of a sister, he recruits rape members on an online bulletin board! He summons the gathered men to his home on her ovulation day once a month for an ovulation day pussy fucking orgy! The men roughly use her vaginal hole like a fleshlight, injecting their semen shot after shot into her premium ovulation day pussy. Even as she struggles and screams, the beautiful girl seeks out sperm to fertilize her egg…
