Assistance to the Diplomatic Extermination Movement

Azusa's sister Hui committed suicide. Azusa thought there was something fishy going on and launched an investigation. Azusa inquired that a mysterious man was conducting a "diplomatic aid and destruction campaign." This person approached female high school students under the guise of assisted dating. After having sex with them, he cruelly branded them as "sows". Azusa remembered that Kei had such a mark on her thigh. Could it be that my sister was the victim of that perverted mysterious man? ! Azusa gets the help of Hui's classmate Cai and prepares to lure the snake out of the hole and avenge his sister. However, she didn't know that what was waiting for her was an unimaginable and terrifying hell...