Arisa, a female teacher, had a student named Kota who refused to attend school. Concerned, Arisa and the class representative, Ema, visited his home, only to discover that Kota was a brutal man who captured women with his delinquent friends for lewd acts. Like butterflies caught in a spider's web, Arisa and Ema fell into the clutches of Kota, his family, and his gang. Subjected to continuous gangbangs, the two lost their sense of self and eventually ended up as sex slaves.