Four works featuring Yui Kawana, Riho Kawauchi, Hiromi Enomoto, and Miki Aikawa. These pure and defenseless girls are targeted by lawless criminals who know no rules, then kidnapped and confined in a secret hideout. Trapped in a situation where resistance is futile, their uniforms are torn off and they are subjected to humiliating acts. Gradually breaking free from fear, they ultimately transform into beings dependent on and aroused by their captors.