Cyan no Yuutsu na Juu (Volume)

is the first volume of the Cyan no Yuutsu na Juu light novel series, written by Natsuki Sahara and Illustrated by Nisieda. It was released under the Dengeki Bunko Imprint in November 2011.

Synopsis
A new detective, Kuya, meets a young priest, Ao, who has blue eyes in the wake of a certain incident. Ao and Soraya pursue a big incident in search of his friend's keepsake. The two who decided to cooperate for each other's purpose gradually began to feel that they could be called trust, but they had a secret that Blue could not be revealed to anyone ... Is it a sin that I should carry on my back? A unique human suspense unfolded by a priest and a new detective.

(source: Bookwalker JP - Translated)