Taimanin Yukikaze 1 - Yukikaze Arc

Story

A near-future Japan overrun by beings of darkness — the malevolent spirits and monsters. The unspoken rule of "mutual non-interference" long upheld between humans and demons began to fray once humans fell to depravity, and criminal organizations and corporations that colluded human and demon operated in the shadows, dragging the age down into chaos. But the people who would walk the righteous path are not powerless. The government of the time organized a group of "ninja" who could oppose "demons" while in human form, and set them against the evil of the human-demon depraved. People called them the "Anti-Demon Ninja"... Amid the ongoing deadly struggle with the forces of the demons, the young Anti-Demon Ninja Yukikaze, together with her senior Anti-Demon Ninja Rinko, volunteers for the dangerous mission of rescuing Yukikaze's missing mother, the Anti-Demon Ninja Shiranui. Infiltrating deep into enemy territory, and moreover forced to do so as prostitutes under difficult circumstances, Yukikaze's will to save her mother is firm, and together with Rinko she begins the infiltration-rescue mission! Still virgins, the two try to offer their virginity to Tatsuro — Yukikaze's childhood friend and Rinko's younger brother — but with that wish unfulfilled, they set off on their mission...!