SPSB-81 Demon Mask: Hero’s Fall — Honomi Wakamiya

Akuma Kamen is a mysterious masked girl plotting to take over the school. Cold and sadistic, she used nunchaku to leave the men both physically and mentally broken. One day, the righteous school boss who fights to protect the academy from Akuma Kamen’s evil schemes kidnaps the new Green Boss of the Boss Alliance. In front of the inexperienced Green Boss, who is shy around women, she tempts a hostage student and puts on a show, then proceeds to thoroughly break down the Green Boss, who cannot resist his instincts, all while the entire student body watches the livestream. [BAD END]