Shoji Harimura

Zwei was an ordinary person, until one day, while walking the streets a night, he witnessed a brutal assassination. He managed to avoid the sniper, a young girl named Ein, but was soon captured, and had the memories of his former life erased. He is spared death only by accepting a condition: to train to become an assassin alongside Ein. Now he must find a way to free himself from this shady world and reclaim his life once again.

Zwei traveled to a new city to start a new life. There he sees the girl of his dreams, Ein, for the very first time. Strangely, he spots her from 500 meters away, while she's crouched behind a military issue sniper rifle picking off mobsters. Soon Zwei's uncanny alertness comes to the attention of Ein's employers, and he's given a simple choice: train to become an assassin, or be marked as Ein's next target.