Lapis Lazuli Wish

A hitman named Sei, with black hair and sapphire-blue eyes, received a certain job. It was something that even made him, whose profession was killing, hesitate. Before him appeared a single girl. That girl was the target Sei was supposed to kill. She entrusts Sei with one wish. What could the girl's wish possibly be――? This work is also posted on the creative writing site 'Nezumi no Sumika'.