Chained Soldier Graphic Novel Volume 01 (Mature)

Otherworldly spaces known as "demon cities" appeared in various parts of Japan, and those who partook in the "peaches" growing there gained unique abilities-but only if they're girls. One day, a down-in-the-dumps high school boy named Yuuki Wagura suddenly gets lost at the entrance of a demon city. There, he meets Kyoka Uzen, the beautiful leader of the seven programs of "Magical Defense Corps," whoo orders him to become her slave?!