Ai DeathGUN

Sajimiya Reiji and Mijou Yashiki are partners who use their "Death Guns" to hunt a group of vampillo-like creatures, known as "Artemis", created due to a natural disaster that occurred in a century before history events. When a group of Artemis, who calls himself "Pleiads", begins to attack the casual people and turn them, naive newcomer Takao Yota joins its two more experienced colleagues to try to track down responsible.