Chained Soldier
Alternative title: Mato Seihei no Slave One day, a high school student named Yuuki Wakura was walking home from school when he suddenly gets lost in a Mato entrance. When he calls for help, he is immediately rescued by Kyouka Uzen, the chief of the Seventh Unit of the Anti-demon Corps. Recognizing his potential while also needing him to make her Peach power more effective, she ask that Yuuki join the Anti-demon Corps by becoming her slave, a position he might find more enjoyable than he initially would have thought...