逢魔警察 ソラとアラシ

It's been three months since Sora, who has zero athletic ability, joined OZ, the Ouma Police, the object of every girl's admiration. His relationship with his partner demon Arashi remains one in which he has no idea what the other is thinking. But Arashi's body is hiding a life-threatening secret...! (Source: Kadokawa, translated)